−Table of Contents
| 2025/07/23 | Procedure |
Run Diary
| 2025/12/08 | IbIs data for Run 84 |
| 2025/10/27 | Preparing for LN2 blowout |
| 2025/09/30 | Closing IVC |
| 2025/10/13 | Preparing for LN2 Transfer, Leak in IVC |
| 2025/09/30 | Closing IVC |
| 2025/09/13 | Closing IVC, Short on LED and phonon lines |
| 2025/09/05 | Tower Installation |
| 2025/07/29 | |
| 2025/07/28 | Electrical check and throughput test at 77K, cryocleaning again. |
| 2025/07/26 | LN2 Transfer, Throughput test at Room temp |
| 2025/07/25 | More cryocleaning |
| 2025/07/24 | IVC, CVJ pumped out, Cryocleaning |
| 2025/07/14 | 1K Valves leak test results |
| 2025/07/02 | 1K tests |
| 2025/07/01 | Leak on Turbo, 1K test |
| 2025/06/30 | Lab Status and Matt's 1K pot test |
| 2025/04/18 | Run 83 initial He transfer |
| 2025/03/04 | Run 83 LN2 transfer and leak checks |
| 2025/02/28 | Run 82 Leak in IVC (part 3) |
| 2025/02/14 | Run 82 Leak in IVC (part 2) |
| 2024/01/29 | Run 82 Leak in IVC |
| 2024/01/13 | Run 82 baratron zero point and one shot to confirm still excess or empty |
| 2024/01/08 | Run 82 baratron installed |
| 2024/12/18 | Run 82 Stable Base 45 mK, SQUID Tuned |
| 2024/12/16 | Run 82 Stable Base 45 mK |
| 2024/11/21 | Run 82 LN2 transfer |
| 2024/11/19 | Run 82 Turbo pumping and Leak in Main Bath |
| 2024/11/06 | Source mover tests at room temperature |
| 2024/11/01 | Cryo-Cleaning Procedure |
| 2024/09/19 | Cooldown after 5K pumpout procedure |
| 2024/09/18 | 5K pumpout procedure |
| 2024/09/13 | tuning squids, spikes in base temp returns |
| 2024/08/19 | LN2 blowout |
| 2024/08/16 | LN2 transfer |
| 2024/08/07 | Replaced indium seal and pumping down IVC |
| 2024/07/22 | LN2 transfer initial steps |
| 2024/07/19 | Cryocleaning mixture with manual GHS |
| 2024/07/18 | Cryocleaning mixture with manual GHS |
| 2024/07/16 | Cryocleaning mixture with manual GHS |
| 2024/06/05 | Pumped back all mixture to dump before working on the electricals |
Run 80
| Run | Det | Det Type | Source | Purpose |
|---|---|---|---|---|
| 80 | S104 | SNOLAB HV prototype | 2D Source Mover with shielded Am-241 | try N-capture run with NaI-array coincidence |
| 2024/05/06 | Initial Data taking started. Source not moved yet. Source location= 0,0,0 | |||
| 2024/05/01 | ||||
| 2024/04/23 | IbIs taken yesterday manually. Try automated IbIs |
Run 79
| Run | Det | Det Type | Source | Purpose |
|---|---|---|---|---|
| 79 | S104 | SNOLAB HV prototype | 2D Source Mover with shielded Am-241 | try N-capture run with NaI-array coincidence |
| 2024/02/21 | ||||
| 2024/02/20 | ||||
| 2024/02/19 | ||||
| 2024/02/18 | ||||
| 2024/02/17 | ||||
| 2024/02/16 | ||||
| 2024/02/15 | ||||
| 2024/02/14 | ||||
| 2024/02/13 | ||||
| 2024/02/12 | ||||
| 2024/02/11 | ||||
| 2024/02/10 | ||||
| 2024/02/09 | ||||
| 2024/02/08 | ||||
| 2024/02/07 | ||||
| 2024/02/06 | ||||
| 2024/02/05 | ||||
| 2024/02/04 | ||||
| 2024/02/03 | ||||
| 2024/02/02 | ||||
| 2024/02/01 | ||||
| 2024/01/31 | ||||
| 2024/01/30 | ||||
| 2024/01/29 | ||||
| 2024/01/28 | ||||
| 2024/01/27 | ||||
| 2024/01/26 | ||||
| 2024/01/25 | ||||
| 2024/01/24 | ||||
| 2024/01/23 | ||||
| 2024/01/22 | ||||
| 2024/01/21 | ||||
| 2024/01/20 | ||||
| 2024/01/18 | ||||
| 2024/01/17 | ||||
| 2024/01/16 | ||||
| 2024/01/12 | ||||
| 2024/01/03 | Cryoclean | |||
| 2024/01/02 | Cryoclean | |||
| 2023/12/20 | Cryoclean | |||
| 2023/12/18 | Cryoclean |
Run 78
between-run activity
| 2023/04/12 | |
| 2023/04/11 | |
| 2023/04/03 | |
| 2023/03/30 | |
| 2023/03/29 | |
| 2023/03/26 | |
| 2023/03/22 | |
| 2023/03/21 | |
| 2023/03/15 (Wed) | Lowered Main Bath |
| 2023/03/14 (Tue) | Leak checking IVC |
| 2023/03/13 (Mon) | Final steps in warmup process |
Run 77
| Run | Det | Det Type | Source | Purpose |
|---|---|---|---|---|
| 77 | S104 | SNOLAB HV prototype | Two Am-source, one fixed, second on 2D source mover with fixed X-arm | – |
| 2023/03/02 | |
| 2023/03/01 | |
| 2023/02/28 | |
| 2023/02/27 | |
| 2023/02/26 | |
| 2023/02/25 | |
| 2023/02/24 | |
| 2023/02/23 | |
| 2023/02/22 | |
| 2023/02/21 | |
| 2023/02/20 | |
| 2023/02/19 | |
| 2023/02/18 (Sat) | Fourth 10K pumpout |
| 2023/02/15 (Wed) | Third 10K pumpout |
| 2023/02/14 (Tue) | |
| 2023/02/13 (Tue) | |
| 2023/02/12 (Tue) | |
| 2023/02/11 (Tue) | Second 10K pumpout (and fridge recovery) |
| 2023/02/10 (Tue) | SQUID Zap Procedure |
| 2023/02/09 (Tue) | |
| 2023/02/08 (Tue) | |
| 2023/02/07 (Tue) | First 10K pumpout |
| 2023/02/06 (Tue) | Electrical Check after first cooldown |
| 2023/02/05 (Tue) | |
| 2023/02/04 (Tue) | |
| 2023/02/03 (Tue) | |
| 2023/02/02 (Tue) | |
| 2023/02/01 (Wed) | First LN2 transfer |
between-run activity
| 2023/01/31 (Tue) | |
| 2023/01/30 (Mon) | |
| 2023/01/29 (Sun) | |
| 2023/01/27 (Fri) | |
| 2023/01/25 (Wed) | |
| 2023/01/24 (Tue) | |
| 2023/01/23 (Mon) | |
| 2023/01/20 (Fri) | |
| 2023/01/19 (Thu) | |
| 2023/01/18 (Wed) | |
| 2023/01/17 (Tue) | Mapping for Thermometer connector |
| 2023/01/12 (Thu) | Made a rectangular copper washer plate for Am pallet source |
| 2023/01/11 (Wed) | 2D source mover bench test. Spark on Pin 1 Y-motor wires |
| 2023/01/10 (Tue) | |
| 2023/01/09 (Mon) | |
| 2023/01/05 (Thu) |
Run 76
| Run | Det | Det Type | Source | Purpose |
|---|---|---|---|---|
| 76 | S104 | SNOLAB HV prototype | Unshielded Am, 2D movable | N-capture run with NaI-array coincidence. |
| 2023/01/03 (Tue) | |
| 2022/12/29 | |
| 2022/12/28 | |
| 2022/12/27 | Continue replacing broken tower wires with mananin. |
| 2022/12/26 (Mon) | Begin replacing broken tower wires with manganin |
| 2022/12/22 | Finish IVC reassembly. Close IVC with no payload for leakcheck purposes. Leak check IVC - no leak seen at stripline elbow or other seals. |
| 2022/12/20 | Replace stripline tube o-rings (use nitrile this time). Remove some rubbery stuff from fridge thermometer connector. Begin IVC reassembly. |
| 2022/12/19 (Mon) | Begin IVC disassembly to replace stripline elbow o-ring. |
| 2022/12/16 | Remove tower from fridge. Find that the tower wires for the motor coils are all broken. Remove 2D source mover. |
| 2022/12/15 | Some research suggests viton o-rings used at stripline elbow degrade with cold-cycling (nitrile is better). Open IVC, begin deinstallation. |
| 2022/12/14 | More stripline elbow leak checks. Lower main bath into pit. |
| 2022/12/13 | Finish disassembly of NaI array and lead/poly shield. Leak check at 274 K confirms leak at stripline elbow. |
| 2022/12/12 (Mon) | Warming up. Shut down NaI array. Start NaI array disassembly. |
| 2022/12/11 | |
| 2022/12/10 | |
| 2022/12/09 | Warming up. Electrical checks @ 13K confirm damage to SQUETs. |
| 2022/12/08 | Begin warmup. Pump mixture to dump. |
| 2022/12/07 | |
| 2022/12/06 | |
| 2022/12/05 (Mon) | |
| 2022/12/04 | |
| 2022/12/03 | |
| 2022/12/02 | |
| 2022/12/01 | Take 0V high-threshold SiHV-triggered data to watch for He films. Warm fridge to 10K, pump out IVC. |
| 2022/11/30 | |
| 2022/11/29 | Cool to base. |
| 2022/11/28 (Mon) | Warm fridge to 10K, pump out IVC. |
| 2022/11/27 | |
| 2022/11/26 | Cool to base. |
| 2022/11/25 | Take 0V SiHV-triggered data to watch for He films. Work out how to “manually” zap SQUIDs. Warm fridge to 10K, pump out IVC. |
| 2022/11/24 | Take low-threshold SiHV-triggered data at -8, -16, -24, -34 V. |
| 2022/11/23 | Cool to base. Find that DAQ tools, sequencer doesn't work yet on DCRC2(CentOS7). |
| 2022/11/22 | Warm fridge to 10K, pump out IVC. |
| 2022/11/21 (Mon) | Take 0V low-threshold SiHV-triggered data. |
| 2022/11/20 | Cool to base |
| 2022/11/19 | Take -80V low-threshold SiHV-triggered data. Warm fridge to 10K, pump out IVC. |
| 2022/11/18 | Finally get MIDAS DAQ working on DCRC2 running CentOS7. Take -80V low-threshold SiHV-triggered data. |
| 2022/11/17 | Cool to base |
| 2022/11/16 | Take -80V data alternating SiHV- and NaI-triggered. Warm fridge to 10K, pump out IVC. |
| 2022/11/15 | Take -80V data alternating SiHV- and NaI-triggered. |
| 2022/11/14 (Mon) | Cool to base. Correct NaI trigger setting for lower window. Take -80V data alternating SiHV- and NaI-triggered. |
| 2022/11/13 | Warm fridge to 10K, pump out IVC. |
| 2022/11/12 | Take -80V data alternating SiHV- and NaI-triggered. |
| 2022/11/11 | Cool to base. Set NaI trigger to lower window. Take -80V data alternating SiHV- and NaI-triggered. |
| 2022/11/10 | He film symptoms seem to arrive earlier than before. Warm fridge to 10K, pump out IVC. |
| 2022/11/09 | |
| 2022/11/08 | Cool to base. |
| 2022/11/07 (Mon) | Find that He-film symptoms arise at about the same time whether or not mixture is in fridge while IVC is closed for a day while warm. Warm fridge to 10K, pump out IVC. |
| 2022/11/06 | Take 0V SiHV-triggered data to monitor baselines. |
| 2022/11/05 | Cool to base. |
| 2022/11/04 | Close IVC valves and pump mixture into dump. Leave it like that for a day with the fridge warm. |
| 2022/11/03 | More evidence that He-film symptoms arrive earlier when IVC is left closed for a day before cooling. Warm fridge to 10K, pump out IVC. |
| 2022/11/02 | Determine that He-film symptoms show up earlier when the IVC is left closed for a day while warm. Take 0V SiHV-triggered data to monitor baselines. |
| 2022/11/01 | Cool to base |
| 2022/10/31 (Mon) | Close IVC valves and leave it like that for a day with the fridge warm |
| 2022/10/30 | Warm fridge to 10K, pump out IVC. |
| 2022/10/29 | |
| 2022/10/28 | Cool to base |
| 2022/10/27 | Take -80V data alternating SiHV- and NaI-triggered. Warm fridge to 10K, pump out IVC. |
| 2022/10/26 | Take -80V data alternating SiHV- and NaI-triggered. |
| 2022/10/25 | Cool to base. Bring PuBe source back into lab. Take -80V data alternating SiHV- and NaI-triggered. |
| 2022/10/24 (Mon) | Warm fridge to 10K, pump out IVC. |
| 2022/10/23 | Take -80V low-threshold SiHV-triggered data. |
| 2022/10/22 | Cool to base. Take -80V low-threshold SiHV-triggered data. |
| 2022/10/21 | Take -80V data alternating SiHV- and NaI-triggered. Warm fridge to 10K, pump out IVC. Move PuBe source out of lab. |
| 2022/10/20 | Take -80V data alternating SiHV- and NaI-triggered |
| 2022/10/19 | Reduce upper threshold of NaI trigger to avoid saturation. Cool to base. Take -80V data alternating SiHV- and NaI-triggered |
| 2022/10/18 | Warm fridge to 10K, pump out IVC. |
| 2022/10/17 (Mon) | Take -80V low-threshold SiHV-triggered data |
| 2022/10/16 | |
| 2022/10/15 | Cool to base |
| 2022/10/14 | Pump out IVC. Add still more vacuum grease to stripline elbow joint, lower stripline elbow all the way. |
| 2022/10/13 | Track rise in phonon baselines as He films build up |
| 2022/10/12 | |
| 2022/10/11 | Cool to base |
| 2022/10/10 (Mon) | Pump out IVC. Add more vacuum grease to stripline elbow joint, lower stripline elbow all the way. |
| 2022/10/09 | Warm fridge |
| 2022/10/08 | |
| 2022/10/07 | |
| 2022/10/06 | Cool to base |
| 2022/10/05 | Continue pumping IVC |
| 2022/10/04 | Warm fridge to 10K, pump out IVC. Add vacuum grease to stripline elbow joint, lower stripline elbow all the way. |
| 2022/10/03 (Mon) | Take -80V low-threshold SiHV-triggered data |
| 2022/10/02 | Take -80V low-threshold SiHV-triggered data |
| 2022/10/01 | Cool to base. Take -80V low-threshold SiHV-triggered data |
| 2022/09/30 | Warm fridge to 10K, pump out IVC. Try raising stripline elbow as far as possible. Bring PuBe source back into lab |
| 2022/09/29 | Take low-threshold SiHV-triggered bg data at 0V and -80V |
| 2022/09/28 | |
| 2022/09/27 | Cool to base. |
| 2022/09/26 (Mon) | Warm fridge to 10K, pump out IVC. Try raising stripline elbow. |
| 2022/09/25 | Take -20V and -80V bg data, SiHV- and NaI-triggered |
| 2022/09/24 | Take -4V bg data, SiHV- and NaI-triggered |
| 2022/09/23 | Cool to base. Remove PuBe source from lab. Take 0V bg data, SiHV- and NaI-triggered |
| 2022/09/22 | Warm fridge to 10K, pump out IVC |
| 2022/09/21 | Take -80V data, alternating SiHV- and NaI-triggered |
| 2022/09/20 | Take -80V data, alternating SiHV- and NaI-triggered |
| 2022/09/19 (Mon) | Cool to base. Take -80V data, alternating SiHV- and NaI-triggered |
| 2022/09/18 | Warm fridge to 10K, pump out IVC |
| 2022/09/17 | Take -80V data, alternating SiHV- and NaI-triggered |
| 2022/09/16 | Cool to base |
| 2022/09/15 | Phonon channels stuck in normal. Warm fridge to >5K. IVC = 0.1 ubar. Pump out IVC overnight. |
| 2022/09/14 | |
| 2022/09/13 | |
| 2022/09/12 (Mon) | Cool to base |
| 2022/09/11 | Phonon channels stuck in normal. Warm fridge to >5K. IVC = 0.1 ubar. Pump out IVC overnight. |
| 2022/09/10 | |
| 2022/09/09 | |
| 2022/09/08 | |
| 2022/09/07 | |
| 2022/09/06 | Take 0V SiHV-triggered data. |
| 2022/09/05 (Mon) | |
| 2022/09/04 | Start 1K Pot and start circulation, cool to base. |
| 2022/09/03 | Start 1K Pot and start circulation, 1K Pot failure, stop circulation. |
| 2022/09/02 | |
| 2022/09/01 | Phonon channels stuck in normal. Warm fridge to >5K. IVC = 0.10 ubar. Pump out IVC overnight. |
| 2022/08/31 | Take -85V coincidence data, alternating SiHV and NaI triggering. Pulses suppressed by helium film around 9pm. |
| 2022/08/30 | Temperature spikes return. Take -85V coincidence data, alternating SiHV and NaI triggering |
| 2022/08/29 (Mon) | Start 1K Pot and start circulation, cool to base. Can't set bias above -85V without high leakage. |
| 2022/08/28 | Phonon channels stuck in normal. Warm fridge to >5K. IVC = 0.1 ubar. Pump out IVC overnight. |
| 2022/08/27 | Take -84V PuBe data. Leakage too high at higher biases. |
| 2022/08/26 | Temperature spikes return. Take -4V, -20V, -65V PuBe data. |
| 2022/08/25 | Start 1K Pot and start circulation, cool to base |
| 2022/08/24 | Phonon channels require high biases or are stuck in superconducting. Warm fridge to >5K. IVC = 0.25 ubar. Pump out IVC overnight. |
| 2022/08/23 | Phonon channels stuck in normal. |
| 2022/08/22 (Mon) | Temperature spikes return. Phonon channels look OK. Take 0V PuBe data, data looks OK. |
| 2022/08/21 | Start circulation, cool to base |
| 2022/08/20 | Start 1K Pot |
| 2022/08/19 | Recent data looks bad, attributed to helium films. Warm fridge to >5K. IVC = 4.6 ubar. Pump out IVC overnight. |
| 2022/08/18 | Find that HV can't be increased above ~-90V without high leakage |
| 2022/08/17 | |
| 2022/08/16 | |
| 2022/08/15 (Mon) | Suddenly apply 100s of V to HV box due to DAQ error. (This seems to have caused some damage.) |
| 2022/08/14 | |
| 2022/08/13 | Evidence that TESs are colder than normal - could be thermal short from He films |
| 2022/08/12 | |
| 2022/08/11 | |
| 2022/08/10 | |
| 2022/08/09 | |
| 2022/08/08 (Mon) | |
| 2022/08/07 | |
| 2022/08/06 | |
| 2022/08/05 | |
| 2022/08/04 | |
| 2022/08/03 | |
| 2022/08/02 | MC temperature spikes seen - first sign of He films problem |
| 2022/08/01 (Mon) | |
| 2022/07/31 | Start circulation, cool to base |
| 2022/07/30 | Initial LHe transfer |
| 2022/07/29 | Transfer LN2 |
| 2022/07/28 | Mixture throughput is OK at ~120K (blockage gone) |
| 2022/07/27 | |
| 2022/07/26 | |
| 2022/07/25 (Mon) | Fridge failure: impedance blockage |
| 2022/07/24 | |
| 2022/07/23 | |
| 2022/07/22 | Do NaI calibrations with PuBe |
| 2022/07/21 | |
| 2022/07/20 | |
| 2022/07/19 | Do NaI calibrations with PuBe |
| 2022/07/18 (Mon) | Do NaI calibrations with PuBe and Na-22 |
| 2022/07/17 | |
| 2022/07/16 | |
| 2022/07/15 | Do NaI calibrations with PuBe and Na-22 |
| 2022/07/14 | Do NaI calibrations with PuBe and Na-22 |
| 2022/07/13 | |
| 2022/07/12 | Take HV-varied data, -200V → 0V |
| 2022/07/11 (Mon) | Take -200V PuBe data alternating Si-triggered and NaI-triggered. |
| 2022/07/10 | |
| 2022/07/09 | Take -200V PuBe data alternating Si-triggered and NaI-triggered. Take 0V NaI-triggered data. |
| 2022/07/08 | Build new E-box purge bag. Take -200V PuBe data alternating Si-triggered and NaI-triggered. |
| 2022/07/07 | Take -200V PuBe data alternating Si-triggered and NaI-triggered. |
| 2022/07/06 | Take 0V PuBe data. Take -200V PuBe data alternating Si-triggered and NaI-triggered. |
| 2022/07/05 | Take -200V PuBe data alternating Si-triggered and NaI-triggered. |
| 2022/07/04 (Mon) | Take -200V PuBe data. Take test data while ramping HV down to 0V. Take 0V PuBe data. Take -200V PuBe data, alternating Si-triggered and NaI-triggered. MIDAS crash after midnight. |
| 2022/07/03 | Powercycle DCRC1 to fix DAQ problem. Take 0V PuBe data. Take -200V PuBe data, alternating Si-triggered and NaI-triggered. HV leakage probably high. |
| 2022/07/02 | Take 0V PuBe data. Take -200V NaI-triggered PuBe data. MIDAS crash, only 12 minutes of biased data. |
| 2022/07/01 | Move PuBe into lab. Set NaI array trigger window to 7.6-11.2 MeV. Take 0V PuBe data. Try HV but leakage too high. |
| 2022/06/30 | Apply voltage to source mover motor coils, all still seem to clearly be open. Power interruption shut off fridge pumps - fridge recovered after restarting pumps. |
| 2022/06/29 | |
| 2022/06/28 | |
| 2022/06/27 (Mon) | |
| 2022/06/26 | |
| 2022/06/25 | |
| 2022/06/24 | Remeasure source mover motor coils, all read open |
| 2022/06/23 | Source mover motor coils all read open |
| 2022/06/22 | |
| 2022/06/21 | |
| 2022/06/20 (Mon) | |
| 2022/06/19 | |
| 2022/06/18 | |
| 2022/06/17 | Take 0V Side2 data with bottom NaI configured for muon coincidence test. One series with S104 triggering, the next with NaI triggering. |
| 2022/06/16 | |
| 2022/06/15 | Test NaI trigger rates with PuBe present. Take 0V Side2 data with PuBe (this time with boron shields). Remove lead from South wall to adjust boron socks, then put it back. Retest NaI trigger rates with PuBe present. |
| 2022/06/14 | Put Borax-filled socks around lower NaI detectors. Test NaI trigger rates with PuBe present. Hang 6 borax-filled socks over vertical NaI stack. |
| 2022/06/13 (Mon) | Fit-test “sock” shield for NaI, filled with salt |
| 2022/06/12 | |
| 2022/06/11 | |
| 2022/06/10 | Adjust NaI rack to accommodate boron shield tubes |
| 2022/06/09 | Test NaI trigger rates with PuBe present. Take 0V Side2 data with PuBe. |
| 2022/06/08 | Build platform to elevate PuBe paraffin drum. Receive new LakeShore RuOx thermometer. Test NaI trigger rates with PuBe present. Take 0V Side2 data with and without PuBe. |
| 2022/06/07 | Optimize lead wall for PuBe shielding with NaI array setup |
| 2022/06/06 (Mon) | Install lead and poly in North wall of lead/poly shield. Stack lead to build lead wall for PuBe gamma shielding. |
| 2022/06/05 | |
| 2022/06/04 | |
| 2022/06/03 | |
| 2022/06/02 | |
| 2022/06/01 | Take 0V Side2 data with Na-22 for coincidence test |
| 2022/05/31 | Take 0V Side2 data with and without Na-22, with three NaI detectors enabled for coincidence test. Adjust 1K Pot needle valve. |
| 2022/05/30 (Mon) | |
| 2022/05/29 | |
| 2022/05/28 | Test NaI rate for Na-22 coincidence test |
| 2022/05/27 | Install lead on South wall of lead/poly shield (NaI side) |
| 2022/05/26 | |
| 2022/05/25 | |
| 2022/05/24 | |
| 2022/05/23 (Mon) | |
| 2022/05/22 | |
| 2022/05/21 | |
| 2022/05/20 | |
| 2022/05/19 | |
| 2022/05/18 | |
| 2022/05/17 | |
| 2022/05/16 (Mon) | |
| 2022/05/15 | |
| 2022/05/14 | |
| 2022/05/13 | Take 0V and -3.8V Side2 data. |
| 2022/05/12 | |
| 2022/05/11 | |
| 2022/05/10 | Take 0V and -196V Side2 data. |
| 2022/05/09 (Mon) | Take 0V Side2 data. Something looks wrong with it. |
| 2022/05/08 | |
| 2022/05/07 | |
| 2022/05/06 | |
| 2022/05/05 | Set DCRC4 to read trigger pulses from NaI array. Triggering on DCRC4 looks OK. |
| 2022/05/04 | |
| 2022/05/03 | Take -240V Side2 data. Breakdown event during prebias. |
| 2022/05/02 (Mon) | Reset remote-HV maximum |
| 2022/05/01 | |
| 2022/04/30 | |
| 2022/04/29 | |
| 2022/04/28 | Take -180V Side2 data. |
| 2022/04/27 | Take -220V Side2 data. |
| 2022/04/26 | Take -180V and -200V Side2 data. (-180V data anomalously noisy.) |
| 2022/04/25 (Mon) | Take -80V, -120V, -140V, -160V Side2 data. |
| 2022/04/24 | Start N2 purge at ebox |
| 2022/04/23 | Try HV remotely, but baselines elevated - suspect humidity is causing leakage at E-box |
| 2022/04/22 | Take 0V and -100V Side2 data. 14keV line resolvable in pulse width. |
| 2022/04/21 | Take 22V Side2 data. Can't resolve 14keV line. |
| 2022/04/20 | Take 100V Side2 data. Can't resolve 14keV line. |
| 2022/04/19 | With correct connections HV for Side2-readout works fine. Do mini-IbIs to set QET biases. |
| 2022/04/18 (Mon) | Discover mistake in connecting cables to HV box |
| 2022/04/17 | |
| 2022/04/16 | |
| 2022/04/15 | Find short from a Side2 channel to chassis - same intermittent tower short that appeared during installation. Try Side2-readout HV board, same problem: TES's go normal when bias applied. Measure NaI trigger rate again. |
| 2022/04/14 | Discover high leakage current with HV, suggesting short to chassis |
| 2022/04/13 | Problem applying HV in Side1-readout mode, TES's go normal |
| 2022/04/12 | |
| 2022/04/11 (Mon) | Problems with DCRC1, fix by swapping DCRC1&3. Using DCRC6 measure trigger rates from NaI array at different thresholds. |
| 2022/04/10 | |
| 2022/04/09 | |
| 2022/04/08 | Set up Side1-readout HV board |
| 2022/04/07 | |
| 2022/04/06 | Data indicates that source didn't move in expected direction. Move source back to center position. Take 2-sided 0V data. 1 |
| 2022/04/05 | Trigger problems with DCRC6 reading NaI array triggers. Move source in positive y direction, see heating. Take 2-sided 0V data. |
| 2022/04/04 (Mon) | Modify LHe transfer procedure to maximize recovery efficiency |
| 2022/04/03 | |
| 2022/04/02 | |
| 2022/04/01 | Successfully connect NaI trigger signals to DCRC6. Trigger problems with DCRC6. |
| 2022/03/31 | Prepare board to connect trigger signals from NaI array to a DCRC |
| 2022/03/30 | Mini-IbIs. Take 2-sided 0V data |
| 2022/03/29 | Mini-IbIs on phonon channels to tune dP/dI |
| 2022/03/28 (Mon) | Test 2D source mover, move source to 0. See fridge heating. Get pulses in all 12 channels by swapping DCRCs 1&3 |
| 2022/03/27 | |
| 2022/03/26 | |
| 2022/03/25 | Try and fail replacing DCRC1 with DCRC5 |
| 2022/03/24 | Troubleshoot problems with DCRC1, try and fail with DCRC6 |
| 2022/03/23 | Calibrate NaI array with PuBe gammas. |
| 2022/03/22 | MC = 28 mK. See pulses on some channels. No pulses on DCRC1. |
| 2022/03/21 (Mon) | Start circulation. MC → 28 mK. Goldman thermometer on Fridge wiring not reading correctly. Assemble 2 walls of lead/poly shield. Put new NaI array on South side of fridge. |
| 2022/03/20 | |
| 2022/03/19 | Blow out LN2. Initial LHe transfer. |
| 2022/03/18 | Transfer LN2. Finish replacing end of Fridge Thermometer Cable 1. Start pumping out IVC at 10:30pm. |
| 2022/03/17 | Turbopump failure - cryostat vacuum jacket pressure high. Drop MB and open IVC, repair broken connection to motor coil. Continue work on Fridge Thermometer Cable 1. Pump out IVC and CVJ in parallel. |
| 2022/03/16 | Cryoclean mixture. Continue warmup. Begin pumping out cryostat vacuum jacket |
| 2022/03/15 | Blow out LN2. Discover IVC leak. Begin warmup, let gas into cryostat vacuum jacket. Begin replacing end on Fridge Thermometer Cable 1 |
| 2022/03/14 (Mon) | Find on motor coil connection broken. Cryoclean mixture. LN2 transfer. |
| 2022/03/13 | |
| 2022/03/12 | Fix tower short. Reinstall tower and begin pumping out IVC. Cryoclean mixture. |
| 2022/03/11 | More 2D source mover tests. Begin tower installation - find short, remove tower. Cryoclean mixture. |
| 2022/03/10 | Prepare interposer and diverter for accessories (2D source mover). Test 2D source mover in fridge clean tent. Cryoclean mixture. |
| 2022/03/09 | Assemble tower. Tower electrical check. |
| 2022/03/08 | Prepare connections for Goldman thermometer and piezoelectric sensor in 2D source mover |
| 2022/03/07 (Mon) | Finish Kapton striplines for 2D source mover. Test mover upside-down on bench. |
| 2022/03/06 | |
| 2022/03/05 | |
| 2022/03/04 | Adjust length of 2D source mover striplines. Solder sockets to ends of connectors for 2D source mover controller. Test new LakeShore resistance bridge with scanner. |
| 2022/03/03 | Make Kapton striplines for 2D source mover wires |
| 2022/03/02 | Realize 2D source mover must be used upside-down based on how it's mounted in housing |
| 2022/03/01 | Fit Am source into new lead collimator cup for 2D source mover. Test new LakeShore bridge without scanner. Disconnect 2D source mover wires from the controller connectors. |
| 2022/02/28 (Mon) | Damage lead collimator cup for 2D source mover. Receive new LakeShore Resistance Bridge with scanner. Map wires on fridge thermometer cables. |
| 2022/02/27 | |
| 2022/02/26 |
Run 75
| Run | Det | Det Type | Source | Purpose |
|---|---|---|---|---|
| 75 | S104 | SNOLAB HV prototype | Unshielded Am, movable | Test new Si-HV detector, find optimal settings/threshold, measure position dependence. Prep for n-capture run. |
| 2022/02/25 | Rewirebond S104 Side1pF |
| 2022/02/24 | Disassemble tower. Remove smoke-detector Am source from 1D source mover. |
| 2022/02/23 | Remove tower from fridge |
| 2022/02/22 | Begin tower deinstallation |
| 2022/02/21 (Mon) | Lower main bath and erect clean tent |
| 2022/02/20 | Continue warmup, MC → 294 K. Pump out cryostat vacuum jacket. |
| 2022/02/19 | |
| 2022/02/18 | Continue warmup, MC → 255 K |
| 2022/02/17 | Continue warmup, MC → 135 K. Remove lead/poly shield. |
| 2022/02/16 | Begin warmup. Let bath boil off, stop circulation and 1K Pot, soften vacuum jacket, pump mixture to dump. |
| 2022/02/15 | Adjust QET biases to reduce dP/dI to 0.4 uV. Take +100V Side2 data. |
| 2022/02/14 (Mon) | Adjust QET biases to reduce dP/dI to 0.7 uV. Take +100V Side2 data. |
| 2022/02/13 | Adjust QET biases to reduce dP/dI from 1.0 to 0.9 uV. Take +100V Side2 data. |
| 2022/02/12 | Perform somewhat hotter Al flash. Take +100V Side2 data. |
| 2022/02/11 | Take +100V Side2 data. Data analysis confirms channel mapping incorrect. Verify that naming convention for DCRC connections on Side2-readout HV board are opposite those for Side1-readout board. |
| 2022/02/10 | Take +100V Side2 data. Move source to y=0mm. |
| 2022/02/09 | Tower = 38 mK, cooler with Side2-readout board c/w Side1-readout. Mini-IbIs suggests that maybe the presumed channel mapping is incorrect. Connect two of the HV board ground planes to improve noise. |
| 2022/02/08 | Modify Side2-readout board so that CONN2 LED wires are connected. Test Side2-readout board - noisy but working |
| 2022/02/07 (Mon) | Bench-test Side2-readout HV board. |
| 2022/02/06 | |
| 2022/02/05 | Take +100V and -100V Side1 data. |
| 2022/02/04 | Take +100V Side1 data, this time with prebias. Move source to y=+30 mm. |
| 2022/02/03 | Take +150V Side1 data. |
| 2022/02/02 | Set up remote-control HV. Take +100V Side1 data. |
| 2022/02/01 | Double-check dead Side1pF with different DCRC. Set up Side1-readout HV. Take +20V Side1 data. |
| 2022/01/31 (Mon) | Repair Side1-readout HV board. |
| 2022/01/30 | |
| 2022/01/29 | |
| 2022/01/28 | Pump out vacuum jacket of transfer line |
| 2022/01/27 | |
| 2022/01/26 | Take 2-sided (0V) data. |
| 2022/01/25 | Take 2-sided (0V) data. Move source to y=0 mm. Measure some Tc's |
| 2022/01/24 (Mon) | Take 2-sided (0V) data. Move source to y=+10 mm. Measure some Tc's |
| 2022/01/23 | |
| 2022/01/22 | |
| 2022/01/21 | Take 2-sided (0V) data. Move source to y=+20 mm. Measure some Tc's |
| 2022/01/20 | |
| 2022/01/19 | Take 2-sided (0V) data. Move source to y=+30 mm. |
| 2022/01/18 | Take 2-sided (0V) data. |
| 2022/01/17 (Mon) | Take 2-sided (0V) data. 41.3 mK. Move source to y=+40 mm. |
| 2022/01/16 | Take 2-sided (0V) data. 44.7 mK |
| 2022/01/15 | Move source to y=+30 mm. Do hot Al flash. |
| 2022/01/14 | Take 2-sided (0V) data. |
| 2022/01/13 | |
| 2022/01/12 | |
| 2022/01/11 | Automated IbIs |
| 2022/01/10 (Mon) | Tower(Goldman) = 41 mK. Automated IbIs. |
| 2022/01/09 | Tower(Goldman) = 42 mK. Mini-IbIs on all channels. Take 2-sided (0V) data. |
| 2022/01/08 | Turn off 15V power on DCRC3&4 but turn it off on DCRC1 - this causes further cooling. Take 2-sided (0V) data. |
| 2022/01/07 | Move source to y=+20 mm. Do hot Al flash. |
| 2022/01/06 | |
| 2022/01/05 | Do hot Al flash which restores Side2pD PCE. Take 2-sided (0V) data. |
| 2022/01/04 | Low amplitudes seen in Side2pD. Move source to y=+10 mm. Take 2-sided (0V) data. |
| 2022/01/03 (Mon) | Move source to y=+2 mm. Take 2-sided (0V) data. Begin adjusting QET biases based on temperature. |
| 2022/01/02 | Mini-IbIs on all channels @ Goldman = 48 mK. |
| 2022/01/01 | Evidence that +steps on source mover move it in -y direction |
| 2021/12/31 | Mini-IbIs on all channels @ Goldman = 48 mK. |
| 2021/12/30 | |
| 2021/12/29 | Move source to y=-2 mm. Square-wave temperature pattern. |
| 2021/12/28 | Mini-IbIs on all channels @ Goldman = 51 mK. Take 2-sided (0V) data |
| 2021/12/27 (Mon) | Mini-IbIs on all channels @ Goldman = 51 mK |
| 2021/12/26 | |
| 2021/12/25 | |
| 2021/12/24 | Mini-IbIs |
| 2021/12/23 | Tower(Goldman) = 48 mK. Mini-IbIs. Measure Tc's of three channels |
| 2021/12/22 | Take 2-sided (0V) data. |
| 2021/12/21 | Install lead/poly shield |
| 2021/12/20 (Mon) | Take 2-sided (0V) data |
| 2021/12/19 | |
| 2021/12/18 | |
| 2021/12/17 | |
| 2021/12/16 | |
| 2021/12/15 | Tower(Goldman) = 50 mK. Automated IbIs |
| 2021/12/14 | Tower(Goldman) = 51 mK. Automated IbIs |
| 2021/12/13 (Mon) | Tower(Goldman) = 53 mK. Automated IbIs |
| 2021/12/12 | |
| 2021/12/11 | |
| 2021/12/10 | Tower(Goldman) = 56 mK. Side1pF not working, seems open. Do automated IbIs |
| 2021/12/09 | Tower(Goldman) = 58 mK. Tune SQUIDs |
| 2021/12/08 | Tower(Goldman) = 63 mK. Tune SQUIDs. |
| 2021/12/07 | Tower(Goldman) → 54 mK. Connect DCRCs, see first pulses. |
| 2021/12/06 (Mon) | Begin circulation. Tower(Goldman thermometer) → 58 mK |
| 2021/12/05 | |
| 2021/12/04 | |
| 2021/12/03 | Initial LHe transfer |
| 2021/12/02 | LHe delay continues. Blow out LN2 to do tests, then transfer LN2 into MB again. |
| 2021/12/01 | Transfer more LN2 because LHe not available |
| 2021/11/30 | Transfer LN2 |
| 2021/11/29 (Mon) | Cryoclean mixture. Lower and raise MB because we forgot to attach the fill funnel. |
| 2021/11/24 | Cryoclean mixture. Prepare Goldman thermometer connection to cable/DCRC diverter board. Test setup for 77K tests of 2D source mover. |
| 2021/11/23 | Cryoclean mixture |
| 2021/11/22 (Mon) | Cryoclean mixture |
| 2021/11/19 | Cryoclean mixture |
| 2021/11/18 | Cryoclean mixture |
| 2021/11/17 | Cryoclean mixture |
| 2021/11/16 (Tue) | Cryoclean mixture |
| 2021/11/05 | Remove external electrode from housing, to use housing for 2D source mover |
| 2021/11/03 | Raise main bath. Cryoclean mixture |
| 2021/11/02 | Cryoclean mixture. Prepare cable for Goldman thermometer readout. |
| 2021/11/01 (Mon) | Finish tower installation, start pumping IVC. |
| 2021/10/29 | Wirebond work on SQUET ZC-70, reduce shunt resistances. Continue tower installation |
| 2021/10/28 | Wirebond work on SQUET ZC-39, reduce shunt resistances. Continue tower installation |
| 2021/10/26 | Wirebond work on SQUET ZC-13, reduce shunt resistances |
| 2021/10/25 (Mon) | Begin tower installation |
| 2021/10/22 | Tower electrical check |
| 2021/10/21 | Assemble tower for Run75. Attach resistors from source mover endstops to chassis. |
| 2021/10/20 | S104 electrical check. Prepare LED wires. Finish replacing resistors on HV board. |
| 2021/10/19 | Rewire connector for Tower thermometer. Prepare connector wires for Goldman thermometer. |
| 2021/10/18 (Mon) | Mount Goldman thermometer to housing lid |
| 2021/10/15 | Work on SQUET/stripline interposer board for accessories. Work on mounting for Goldman thermometer. |
| 2021/10/14 | More twisted pairs, continue replacing resistors on HV board |
| 2021/10/13 | Finish S104 wirebond repairs. Begin replacing resistors on HV board. |
| 2021/10/12 | Start twisted-pair assemblies for phonon channels |
| 2021/10/11 (Mon) | S104 wirebond repairs. Disassemble Run74 tower |
Run 74
| Run | Det | Det Type | Source | Purpose |
|---|---|---|---|---|
| 74 | USD1 | USD-Ge 100mm 4Q | Unshielded Am, movable | Test time-dependent impact ionization properties of USD1. Followup of Run67 |
| 2021/10/08 | Remove tower. Begin replacing resistors on HV board, to set up for HV bias to 6 Side2 phonon channels. |
| 2021/10/07 | Deinstall up to 100 mK stage. S104 wirebond repairs. Order bias resistors for HV board. |
| 2021/10/06 | Deinstall 4K stage |
| 2021/10/05 | Open IVC, begin deinstallation |
| 2021/10/04 (Mon) | |
| 2021/10/01 | Pump out CVJ for a few hours. Lower MB. Erect clean tent. |
| 2021/09/30 | Let gas into CVJ again, warming too slowly. |
| 2021/09/29 | Continue warmup. MC reaches 260 K. Pump out cryostat vacuum jacket. |
| 2021/09/28 | Continue warmup |
| 2021/09/27 (Mon) | Start warmup. Soften vacuum in cryostat vacuum jacket. Remove lead/poly shield from fridge. |
| 2021/09/26 | +10/0V data @ 4-6 K. Noise data as high as 10 K. |
| 2021/09/25 | +10/0V data @ 1.3 - 3.3 K. Also take noise before-and-after bias at various temperatures. |
| 2021/09/24 | +10/0V data @ 4.7 K. 1K Pot failure. Tower bottoms out at 3.3 K. Cool further by pumping on mixture, treating it as a 4He fridge. +10/0V data at various temperatures from 2-4 K. |
| 2021/09/23 | Let MB boil away - then decide to transfer more. Do “initial” LHe transfer. |
| 2021/09/22 | +10/0V data (and one -10/0V series) at various temperatures 2-3.5 K |
| 2021/09/21 | +9/0V data @ base. Breakdown tests. Stop circulation and 1K Pot. +10/0V data @ 0.8 K and 1.3 K |
| 2021/09/20 (Mon) | +8/0V data @ base. Noise data before-and-after bias. +10/0V data. |
| 2021/09/19 | |
| 2021/09/18 | +10/0V data @ base |
| 2021/09/17 | +10/0V, -10/0V data @ 2.3 K. Restart circulation. |
| 2021/09/16 | +10/0V data @ 2.1 K |
| 2021/09/15 | +10/0V data @ 1.9 K |
| 2021/09/14 | -10/0 / +10/0V data, +10/0V data @ 1.5 K. Stop fridge circulation, 1K Pot still on. |
| 2021/09/13 (Mon) | +10/0 / +12/0V data. +10/0V data at base, then 1.15 K, then base again. |
| 2021/09/12 | |
| 2021/09/11 | +12/0V data, but it overtriggered. |
| 2021/09/10 | -10/0V, -12/0V data. +8/0V, +10/0V data - seems to have fallen into “weak” state. Warm to 1.0 K, take +10/0V data. |
| 2021/09/09 | -8/0V data. Breakdown tests on Side2, both polarities. |
| 2021/09/08 | Ba-133 +8/0V data. -8/0V data. |
| 2021/09/07 | Take +8/0V, +10/0V data. Then +8/0 / +10/0V alternating. Then Ba-133 +8/0V data. |
| 2021/09/06 (Mon) | Take 0/-8 / 0/-10 V data. |
| 2021/09/05 | Take 0/-8V data |
| 2021/09/04 | Take 0/-10V / 0/-8V alternating data. |
| 2021/09/03 | Take 0/-10V data with half the FETs turned off. Impact ionization is stronger than before. Try again with all FETs on, i.i. still strong. Seems to be in stronger state. |
| 2021/09/02 | Take +10/0V data at base, 1.0 K, base again. Impact ionization slightly stronger at higher temperature. |
| 2021/09/01 | Noise problems, turned out that 2 channels were left biased. Take +10/0V data. Do some stepper motor tests at room temperature. |
| 2021/08/31 | Take some data with bias changed during series. Take +10/0V data at 0.87 K and at base. |
| 2021/08/30 (Mon) | Take +10/0V data |
| 2021/08/29 | |
| 2021/08/28 | |
| 2021/08/27 | Take +12/0V data (detector in strong i.i. state) |
| 2021/08/26 | Take some data with bias changed during series. Detector seems to have shifted to stronger state. |
| 2021/08/25 | Take some data with bias changed during series. |
| 2021/08/24 | Take +12/0V, +14/0V, 0/-16V data. |
| 2021/08/23 (Mon) | Take +9.8/0V, +10/0V, 0/-10V data. Detector seems to have shifted to weaker state. |
| 2021/08/22 | |
| 2021/08/21 | Take 9.8/0V data |
| 2021/08/20 | Take data scanning +6/0V to +9.5/0 V |
| 2021/08/19 | Take +10/0V data at base, 0.86 K, base again. Detector transitions to stronger state. Try going from +10/0V to +10/-8V after i.i. peak - causes breakdown. |
| 2021/08/18 | Move source to y=0 mm. Take 0/-10 V data at 0.4 K and at base. |
| 2021/08/17 | Take 0V/-12V data, 0V/-10V data. Move source, take data with source near/over blocker. |
| 2021/08/16 (Mon) | some data mistakes - wrong thresholds, no flash |
| 2021/08/15 | overtriggered data |
| 2021/08/14 | Notice DCRCs have been unsynced since 07/26. Resync DCRCs |
| 2021/08/13 | Take 0V/-12V data with Na-22 source. Change bias during series: 0/-9 → 0/-12 V and 0/-12 → 0/0 V. Detector transitions to stronger i.i. “state”. |
| 2021/08/12 | Take 0V/-12V data with Na-22 source |
| 2021/08/11 | Take 0V/-9V data, repeat with Na-22 source. |
| 2021/08/10 | Take 0V/-15V data while measuring leakage current. |
| 2021/08/09 (Mon) | Take 0V/-12V data with source above q3. Move source to y=-40 mm. Take 0V/-12V data with source above q2. Move source to y=0mm. |
| 2021/08/08 | |
| 2021/08/07 | Take 0V/-12V data. Move source to y=-30 mm. |
| 2021/08/06 | Take 0V/-12V data. Move source to y=-20 mm. |
| 2021/08/05 | Take 0V/-9V data. Move source to y=-10 mm. |
| 2021/08/04 | Take 0V/-12V data. |
| 2021/08/03 | Take 0V/-15V data. See transient breakdown (dropout) during data series. Try monitoring test resistor, too much noise. |
| 2021/08/02 (Mon) | Take 0V/-15V data. See transient breakdown (dropout) during data series. |
| 2021/08/01 | |
| 2021/07/31 | |
| 2021/07/30 | Problem with /data/cdms1, can't take data |
| 2021/07/29 | Take 0V/-15V data |
| 2021/07/28 | Try removing pi filters to see if it improves oscillation noise. Detector has shifted into medium-strength “state”. Try long flash. Repair some wirebonds on S104. |
| 2021/07/27 | Take 0V/-15V data |
| 2021/07/26 (Mon) | Take 0V/-15V data at base temperature. Detector has shifted into strong impact ionization “state” |
| 2021/07/25 | |
| 2021/07/24 | |
| 2021/07/23 | Take data at 0.66 K |
| 2021/07/22 | Take Na-22 data. |
| 2021/07/21 | Measure rate with Na-22. Take Na-22 data. |
| 2021/07/20 | Measure rate with Na-22. Take Na-22 data. Take data while moving source. |
| 2021/07/19 (Mon) | Take Na-22 data |
| 2021/07/18 | |
| 2021/07/17 | |
| 2021/07/16 | Measure event rates in detector with and without external Ba source present. |
| 2021/07/15 | Take 0V/-15V data and move source about 0.5 mm during data series. |
| 2021/07/14 | Take 0V/-15V data. Verify that source is at center (or at least that it is over q4). |
| 2021/07/13 | Take 0V/-15V data. Noise is higher than previous week. |
| 2021/07/12 (Mon) | |
| 2021/07/11 | |
| 2021/07/10 | Move source to far endstop, then move it to center again. |
| 2021/07/09 | Take 0V/-15V data, determine source is over q3 (not at center). Discover broken wires on source mover diverter board, repair these. |
| 2021/07/08 | Realize source position is unknown - move to what might be the center. Try taking 0V/-15V data. |
| 2021/07/07 | Much lower noise in charge channels. Take 0V/-15V data. |
| 2021/07/06 | Find lower limit for source mover power. Take 0V/+15V data. |
| 2021/07/05 (Mon) | |
| 2021/07/04 | |
| 2021/07/03 | Try source mover at lower voltage to reduce heating |
| 2021/07/02 | Check S104, find many broken wirebonds. |
| 2021/07/01 | Reach endstop, verified by contact resistance (wire labeled “far endstop”). Measure fridge cooling curve and compare with heating from source mover. |
| 2021/06/30 | Move source at 5.3 mm/hour without runaway heating. Receive SNOLAB Si-HV prototype detector S104 from SLAC. |
| 2021/06/29 | Experiment with different source mover movement speeds. 9.5 mm/hour results in runaway heating. |
| 2021/06/28 (Mon) | Confirm that source reached far endstop (or one of them at least) by backing up then moving forward again and seeing drop in temperature spikes. Start moving in the other direction toward near endstop. |
| 2021/06/27 | |
| 2021/06/26 | |
| 2021/06/25 | Move source further than should be needed to reach far endstop, but not seeing contact. |
| 2021/06/24 | |
| 2021/06/23 | |
| 2021/06/22 | Move source up to 128 steps with no decrease in current. Move far enough to reach near endstop. |
| 2021/06/21 (Mon) | Test source mover. |
| 2021/06/20 | |
| 2021/06/19 | |
| 2021/06/18 | |
| 2021/06/17 | |
| 2021/06/16 | |
| 2021/06/15 | High noise in charge channels, oscillations @ ~3 kHz |
| 2021/06/14 (Mon) | Manage to get MIDAS working on cdms1 (still on Scientific Linux) |
| 2021/06/13 | |
| 2021/06/12 | Tower thermometer suspected to be reading too high |
| 2021/06/11 | Start circulation. MC → 33 mK |
| 2021/06/10 | Initial LHe transfer |
| 2021/06/09 | Cryoclean mixture. Transfer LN2 |
| 2021/06/07 (Mon) | Leak check IVC at 300K. Raise MB. |
| 2021/06/04 | Cryoclean mixture. Finish tower installation, pump out IVC. |
| 2021/06/03 | Cryoclean mixture |
| 2021/06/02 | Install tower. Fix broken connection on tower thermometer plug. |
| 2021/06/01 (Tue) | Install lower stripline heatsink |
| 2021/05/28 | Install 30mK can and middle IVC section |
| 2021/05/27 | Install 100mK can and MC spool |
| 2021/05/26 | Reassemble plumbing at top of fridge. Install upper stripline heatsink. |
| 2021/05/25 | Install stripline tube and upper IVC section. |
| 2021/05/24 (Mon) | Finish filing holes in fridge baffles, raise stripline tube again. |
| 2021/05/23 | |
| 2021/05/22 | |
| 2021/05/21 | Remove stripline tube again because new scratches are visible. Try filing edges of holes in fridge baffles. |
| 2021/05/20 | Reattach loose stripline baffles. Cover holes in baffles with Kapton tape, raise stripline tube into place. |
| 2021/05/19 | Sand fridge port for stripline tube, holes in fridge baffles |
| 2021/05/18 (Tue) | Polish 30mK, 100mK cans |
| 2021/05/13 | Remove o-ring from stripline elbow. Polish scratches out of top of stripline tube. |
| 2021/05/12 | IVC disassembly: remove upper IVC section and stripline tube |
| 2021/05/11 | IVC disassembly: remove middle IVC section, 30mK can, MC spool, 100mK can |
| 2021/05/10 (Mon) | Deinstall tower |
| 2021/05/09 | Warming, fridge → 275K |
| 2021/05/08 | Warming, fridge → 240K |
| 2021/05/07 | Warming, fridge → 123K |
| 2021/05/06 | Verify that leak is probably not from dilution unit. Try 1K Pot, doesn't cool effectively as expected due to IVC leak. Let He into cryostat vacuum jacket |
| 2021/05/05 | Initial LHe transfer. AGAIN, IVC pressure starts rising during transfer. IVC leak still present. |
| 2021/05/04 | Transfer LN2 |
| 2021/05/03 (Mon) | Tighten bolts on upper IVC flanges, then raise MB again |
| 2021/05/02 | Fridge → 276 K |
| 2021/05/01 | Warming, fridge → 240K |
| 2021/04/30 | Try to identify gas in IVC. Warming, fridge → 183K. |
| 2021/04/29 | Let He into cryostat vacuum jacket, warm to 76K |
| 2021/04/28 | Initial LHe transfer. Again, IVC pressure starts rising during transfer, evidently an IVC leak. Conclude that it's not the stripline elbow. Seems to be one of the upper IVC flanges. |
| 2021/04/27 | Transfer LN2 |
| 2021/04/26 (Mon) | Cryoclean mixture. MIDAS fails to work after cdms2 upgrade to CentOS. |
| 2021/04/25 | |
| 2021/04/24 | |
| 2021/04/23 | Leak check IVC indium seals at room temperature, no leaks detected. Replace bottom indium seal, repump out IVC. |
| 2021/04/22 | Warming, fridge → 270 K |
| 2021/04/21 | Warming, fridge → 230 K |
| 2021/04/20 | Warming, fridge → 160 K. Leak seems to disappear. |
| 2021/04/19 (Mon) | Let He into cryostat vacuum jacket, warm to 50K |
| 2021/04/18 | IVC leak still present at 4K, can't pump it down below 0.16 mbar |
| 2021/04/17 | |
| 2021/04/16 | Initial LHe transfer. IVC pressure starts rising during transfer, evidently an IVC leak. |
| 2021/04/15 | Transfer LN2 |
| 2021/04/14 | Cryoclean mixture. Raise main bath. |
| 2021/04/13 | Identify Side Coax Extender as likely location of short. Modify Tower and reinstall, seal IVC |
| 2021/04/12 (Mon) | Remove tower |
| 2021/04/11 | Lower Main Bath |
| 2021/04/10 | Pump out cryostat vacuum jacket |
| 2021/04/09 | Continue warmup |
| 2021/04/08 | Fix wirebonds on Side Coax ST-3-8 |
| 2021/04/07 | At 77K short disappears then reappears. Blow out LN2, start warming |
| 2021/04/06 | Transfer LN2. q4 FET Gate short reappears. Conclude that problem is with Side Coax ST-3-10 |
| 2021/04/05 (Mon) | Continue pumping IVC, cryoclean mixture |
| 2021/04/04 | Continue pumping IVC, leak signal falling |
| 2021/04/02 | Continue pumping IVC, leak signal falling |
| 2021/04/01 | Continue pumping IVC. Leak signal falls slowly |
| 2021/03/31 | Find very high leak signal in IVC. Later theorize this was caused by overpressurizing IVC with He. Cryoclean mixture. |
| 2021/03/30 | Insulate SQUET flyover cable, hoping to fix short. Close IVC and pump out. Cryoclean mixture. |
| 2021/03/29 (Mon) | Open IVC, investigate electrical short, find thermal short |
| 2021/03/28 | Continue warmup |
| 2021/03/26 | Continue warmup |
| 2021/03/25 | Continue warmup, let He into IVC and Cryostat Vacuum Jacket |
| 2021/03/24 | Tower stuck at 0.4 K. Test source mover, Tower heats to 0.8 K. Begin warmup to fix electrical short and thermal problem. |
| 2021/03/23 | Tower only cools to 0.4 K. Fix power problem in DCRC1(55). Noise in q4 somewhat better; take +11/0V data, resolution bad. |
| 2021/03/22 (Mon) | Warm to 3.7 K. q4 short still present. Bump fridge, see q4 short jump around. Start cooldown. |
| 2021/03/21 | Discover hard short from q4 FET gate to chassis. Start warming to pump He out of IVC. |
| 2021/03/20 | Troubleshoot q4 noise. |
| 2021/03/19 | Excess noise in q4 |
| 2021/03/18 | Take +10/-10V data, see delayed tower heating - from LN2 transfer? |
| 2021/03/17 | Take +10/-10V data, see tower heating. |
| 2021/03/16 | Take +10/0V data, -11/0V data |
| 2021/03/15 (Mon) | Take 0/-15V data, see 60keV line and impact ionization. |
| 2021/03/14 | Take +11V/0V data. Take 0/-15V data, notice tower heating. |
| 2021/03/13 | Troubleshoot power problems with DCRC1(55). Successfully use HV supply with no excess noise. |
| 2021/03/12 | More Side2 connection troubleshooting, take 0/-15 V data using HV on Side2, DIB1 only. |
| 2021/03/11 | Take +11V data with DIB1 only. |
| 2021/03/10 | Tower → 91 mK after partial warmup and cooldown. Troubleshoot Side2 connection by grounding it through breakout box. Successfully use HV supply. |
| 2021/03/09 | Warm tower to 3.5 K, establish Side1/Side2 continuity. Start cooling again. |
| 2021/03/08 (Mon) | Start warming MC to recheck Side1/Side2 continuity |
| 2021/03/07 | Take -11V data. |
| 2021/03/06 | q4 noise spontaneously disappears. Take 11V data, finally see 60keV line. Estimate CCE from muons. |
| 2021/03/05 | High noise in q4, can't fix it. |
| 2021/03/04 | Try HV biasing but connecting to HV supply produces high noise. Later, high q4 noise. |
| 2021/03/03 | Investigate theory that Side2 isn't connected. Take 7V data with Side2 floating. |
| 2021/03/02 | High noise in q4 - later it spontaneously disappears. Take 7V data. |
| 2021/03/01 (Mon) | Take -7V data. Investigate theory that Side2 isn't connected. Take 7V data. |
| 2021/02/28 | Take 1V, 3V, 7V data |
| 2021/02/27 | Take 5V data. Establish recommended setup for LHe transfers. |
| 2021/02/26 | Take 7V data. |
| 2021/02/25 | Take 7V data, trigger thresholds too low. |
| 2021/02/24 | Fix unstable baseline problem by depowering SQUIDs. Take 0V test data |
| 2021/02/23 | Take 5V data. Unstable baseline problem continues. |
| 2021/02/22 (Mon) | Take 5V test data. Unstable baseline problem continues. |
| 2021/02/21 | |
| 2021/02/20 | |
| 2021/02/19 | Take test data. Unstable charge baselines. |
| 2021/02/18 | Start 1K Pot, start circulation. Set up DCRCs. |
| 2021/02/17 | Initial LHe transfer. First use of new LHe transfer line. |
| 2021/02/16 (Tue) | Transfer LN2 |
| 2021/02/12 | Cryoclean mixture. |
| 2021/02/11 | Cryoclean mixture. Prepare room-temperature HV diverter board. |
| 2021/02/10 | Cryoclean mixture. |
| 2021/02/09 | Cryoclean mixture. |
| 2021/02/08 (Mon) | |
| 2021/02/07 | |
| 2021/02/06 | |
| 2021/02/05 | |
| 2021/02/04 | |
| 2021/02/03 | Cryoclean mixture. Adjust MB bolts. |
| 2021/02/02 (Tue) | Cryoclean mixture. Raise MB - problems with bolts. |
| 2021/01/29 | Remove fridge clean tent. Pump out fridge and traps. |
| 2021/01/28 | Complete tower installation. Tower electrical checkout is good. Begin pumping out IVC. |
| 2021/01/27 | Plug in SQUETs for a tower electrical checkout - see shorts at first but then they disappear. Continue tower installation. |
| 2021/01/26 | Remove tower and check in clean room - no electrical problems seen at tower, detector, side coax. Begin reinstalling tower. |
| 2021/01/25 (Mon) | Continue tower removal |
| 2021/01/22 | Tower electrical checkout: find shorts from DIB1 channels to chassis. At tower, it seems like these channels are not connected to detector. Begin deinstallation. |
| 2021/01/21 | Finish tower installation, attach SQUETs. |
| 2021/01/20 | Continue tower installation |
| 2021/01/19 (Tue) | Redo connector for source mover motor coils. Begin reinstalling tower. |
| 2021/01/15 | Begin repairing source mover motor coil connectorl |
| 2021/01/14 | Continue tower installation. After removing fridge stand do electrical check: find broken source mover motor coil. Deinstall tower. |
| 2021/01/13 | Assemble Run 74 tower. Begin tower installation. |
| 2021/01/12 | Find broken wirebond on USD1, repair wirebond. |
| 2021/01/11 (Mon) | Tower assembly check |
| 2021/01/07 | Bend pin on side coax extender so we can re-route the USD1 Side2 bias electrode wire for HV biasing. Arrange wiring for accessories which will bypass the SQUET (source mover motor, endstops, HV electrode). |
| 2021/01/06 | Solder source mover coil wires to connector. |
| 2021/01/04 (Mon) | Reassemble source mover motor and mount source mover in housing. Electrical check of USD1 detector and side coaxes. |
| 2020/12/30 | Make Kapton stripline for wires from second motor coil. New LHe transfer line arrives. |
| 2020/12/23 | Re-wind motor coil with broken ends. Electroplate ends of motor coil wire. |
| 2020/12/22 | Make Kapton stripline for wires from one motor coil. On the second coil the ends break off - unwind this coil in prep to electroplate again. |
| 2020/12/15 | Re-wind second motor coil. Begin electroplating ends of NbTi wire |
| 2020/12/14 | Re-wind one source mover motor coil in prep for electroplating |
| 2020/12/11 | Disassemble source mover motor and unwind coils |
Run 73
| Run | Det | Det Type | Source | Purpose |
|---|---|---|---|---|
| 73 | G101D | 100mm Ge HV | Unshielded Am, movable | Test GeHV with etched side 2 and movable source with solder joint heat sinking. Post pandemic shutdown continuation of Run 72 |
| 2020/12/04 | Disassemble Run 73 Tower |
| 2020/11/24 | Remove tower as 1-person job, using scissor-jack. |
| 2020/11/23 | Troubleshoot DAQ after IT changes, get it working. |
| 2020/11/20 | Investigate bad phonon channel. Remove 4K and 100mK stages. |
| 2020/11/19 | Open IVC, disconnect striplines, remove diverter and SQUETs |
| 2020/11/18 | |
| 2020/11/16 (Mon) | Erect clean tent. Hook up DCRC1 for DAQ tests. |
| 2020/11/13 | |
| 2020/11/12 | Lower main bath. |
| 2020/11/11 | Warming up. MC→282 K. Pump out cryostat vacuum jacket. |
| 2020/11/10 | Warming up. Finish removing lead/poly shield from lab. MC→265 K. |
| 2020/11/09 (Mon) | Warming up. MC→248 K. |
| 2020/11/07 | Warming up. Soften cryostat vacuum jacket with N2. MC→93 K. |
| 2020/11/06 | Warming up, MC→27 K. Start disassembling lead/poly shield. |
| 2020/11/05 | Begin final warmup: stop circulation and 1K Pot, turn on heaters. Tower → 17 K |
| 2020/11/04 | Take 0V data (despite confusing DCRC4 IbIs). Troubleshoot DCRC4 IbIs by switching to a different DCRC - behavior persists. Move source to pB inner edge. |
| 2020/11/03 | More strange IbIs behavior in DCRC4 channels. Detector temperature ~ 69 mK. |
| 2020/11/02 (Mon) | Isolate 1K Pot. Warm Tower with heaters and LEDs, max 7.5 K. Restart 1K Pot. Restart circulation. Tower thermometer → 63 mK. |
| 2020/11/01 | IbIs suggests detector temperature much higher than Tower thermometer. Strange “stretched” IbIs in one channel. Stop circulation to try partial warmup. |
| 2020/10/31 | Strange IbIs behavior, perhaps due to helium films. |
| 2020/10/30 | Take 0V data. Do hot Al flash to try to remove trapped flux. |
| 2020/10/29 | Take 0V data. See lower amplitudes, faster fall-times - either trapped flux or helium films? Try faster source moving |
| 2020/10/28 | Powercycle DCRC2 to get DAQ working again. View waveforms from Arduino motor driver to test faster source moving. Take 0V data. |
| 2020/10/27 | Move source until it hits endstop, at y = -41.936 mm. Take 0V data, +300V drifted data. DAQ crash during data series. |
| 2020/10/26 (Mon) | Take -10V drifted data. Try moving source until it contacts endstop, don't quite reach it. |
| 2020/10/25 | Take +10V, -100V drifted data |
| 2020/10/24 | Take -300V drifted data, 0V data, +300V,+100V drifted data. |
| 2020/10/23 | Take +300V,+100V,10V drifted data. Take 0V data. Take -100V,-300V drifted data. Move source to y = -41.010 mm |
| 2020/10/22 | Solve HV problem - need to make sure remote-control DCRC is electrically isolated. Take +300V,+100V drifted data. Move source to y = -39.357 mm |
| 2020/10/21 | Take +10V drifted data with manual HV drifting. Find Kepco supply is working, reconnect for remote HV. But later discover HV won't go above 1V |
| 2020/10/20 | Check HV supply - looks like Kepco supply is dead, later turns out to be OK |
| 2020/10/19 (Mon) | Take -300V,-10V drifted, 0V data. Problem with HV, won't go above 1V |
| 2020/10/18 | Evidence that Tower Thermometer is reading much higher than detector temperature. IbIs suggests detector temperature is lower an much stabler. Take -300V,-10V,-100V drifted data. Move source to y = -36.116 mm |
| 2020/10/17 | Take 0V and +300V,+100V,+10V drifted data, adjusting QET biases constantly. |
| 2020/10/16 | Take 0V and -300V,-100V,+100V, +300V drifted data, adjusting QET biases constantly. Move source to y = - 29.501 mm |
| 2020/10/15 | Take 0V data. Start using Root macro to adjust QET biases constantly based on Tower temperature. Take -300V, -100V, -10V drifted data. Failed source move because Dwell inadvertently set to 0 ms. Move source to y = -24.077 mm. |
| 2020/10/14 | Take 0V and +300V, +100V drifted data, adjusting QET biases during data. |
| 2020/10/13 | Take 0V and -300, +300V drifted data. Adjust QET biases during data to correct for temperature variations. |
| 2020/10/12 (Mon) | Take -300V drifted data. Try adjusting QET biases during data to correct for temperature variations. Move source to y = -19.712 mm |
| 2020/10/11 | Take -100V drifted data. |
| 2020/10/10 | Measure IbIs. Create curves for optimal QET bias versus temperature. Take 0V and +100,+300V drifted data. |
| 2020/10/09 | Tower = 68 mK. Measure IbIs. Take 0V and +100V drifted data. |
| 2020/10/08 | Start 1K Pot and start circulation. MC→31 mK |
| 2020/10/07 | Blow out LN2. Initial LHe transfer. |
| 2020/10/06 | 1K Pot throughput test at 287 K. Transfer LN2. |
| 2020/10/05 (Mon) | MC = 286 K. Pump out IVC |
| 2020/10/02 | MC → 274 K. Pump out CVJ. |
| 2020/10/01 | 1K Pot throughput test at 230 K. Continue warmup toward RT |
| 2020/09/30 | 1K Pot throughput test at 122 K and 130 K. Let more gas into CVJ to accelerate warmup |
| 2020/09/29 | 1K Pot throughput test at >7K. Let gas into IVC and cryostat vacuum jacket to accelerate MB boiloff. |
| 2020/09/28 (Mon) | 1K Pot doesn't work. Apparently leaving it open to IGH during warmup caused it to become contaminated with ice. 1K Pot throughput test at 4 K |
| 2020/09/27 | MC unusually warm again, 11 K. Add transfer gas to cool again. Realize DCRCs were on, which apparently was keeping it warm. |
| 2020/09/26 | MC unusually warm after LHe transfer. 1K Pot doesn't work. Add exchange gas to IVC to recool, then pump out again |
| 2020/09/25 | Initial LHe transfer |
| 2020/09/24 | Continue warmup (with no gas added to cryostat vacuum jacket) |
| 2020/09/23 | Tower ~ 70 mK, unstable. Stop circulation and 1K Pot to warm up. Add helium to IVC. Use heaters and LEDs to accelerate warming. |
| 2020/09/22 | Tower = 62 mK. Measure IbIs. Take +300V, -100V, -300V drifted data. Move source to y = -17.992 mm |
| 2020/09/21 (Mon) | Tower = 65 mK. Measure IbIs. Take 0V, +100V drifted data. Temperature excursions. |
| 2020/09/20 | Tower → 66 mK. Not as good as last cooldown. |
| 2020/09/19 | Start 1K Pot. Start circulation. MC → 31.5 mK (with DCRCs on) |
| 2020/09/18 | Initial LHe transfer. |
| 2020/09/17 | Cryoclean mixture. Mixture throughput test at 257 K. Perform 1K Pot throughput test. Transfer LN2. |
| 2020/09/16 | Cryoclean mixture. Warm to MC = 244 K. Pump out cryostat vacuum jacket overnight. |
| 2020/09/15 | Warm to MC = 150 K |
| 2020/09/14 (Mon) | Let helium into IVC and cryostat vacuum jacket to accelarate warmup. Pump mixture to dump. |
| 2020/09/13 | Tower = 60 mK. Take +300V, -100V drifted data. Move source to y = -12.502 mm. Stop circulation and 1K Pot to begin warmup. |
| 2020/09/12 | Tower temperature excursions, 60s-80s mK. Take 0V and 100V data. |
| 2020/09/11 | Take 0V data. Spiky triggers. 1K Pot develops partial blockage (perhaps correlated with transfer from Praxair Dewar) Move source to y = -9.988 mm |
| 2020/09/10 | Take -300V, -100V drifted data. Move source to y = -5.887 mm, over blocker. |
| 2020/09/09 | Tower = 48 mK. Start using ROOT Sequencer. Take +300V, +100V drifted data. |
| 2020/09/08 | Take +300V drifted data. MIDAS sequencer lag worse than usual. |
| 2020/09/07 (Mon) | Move source to y = -3.969mm. Take 0V data |
| 2020/09/06 | Take -100V drifted data at elevated base temperature |
| 2020/09/05 | |
| 2020/09/04 | Take -250V and +250V constant-bias data |
| 2020/09/03 | Take -50V drifted data |
| 2020/09/02 | Take -250V, -300V drifted data |
| 2020/09/01 | Tower = 49 mK. Take -200V data |
| 2020/08/31 (Mon) | Tower = 50 mK. Take +200V, +250V, +300V drifted data. Pump cryostat vacuum jacket. |
| 2020/08/30 | Tower = 49 mK |
| 2020/08/29 | Tower = 49 mK. |
| 2020/08/28 | Tower = 49 mK. Take -150V data. |
| 2020/08/27 | Tower = 49 mK after zap. Take 0V, -100V data. |
| 2020/08/26 | Tower = 53 mK. Take +150V data. Switch turbo pump back to IVC. |
| 2020/08/25 | Tower = 53 mK. Take 0V, +100V data. |
| 2020/08/24 (Mon) | Tower = 53 mK. Switch turbo to pump on cryostat vacuum jacket instead of IVC. |
| 2020/08/23 | Tower = 53 mK. |
| 2020/08/22 | Tower = 48 mK. Take 0V data. Fixed EBox purge. |
| 2020/08/21 | Tower = 45-48 mK. Take +75V data |
| 2020/08/20 | Start 1K Pot, start circulation. MC → 29 mK. |
| 2020/08/19 | Let He into cryostat vacuum jacket to boil off bath. Warm fridge to 12 K, see He in IVC. Pump He out of IVC and pump out jacket, do an “initial” LHe transfer. |
| 2020/08/18 | Stop circulation and 1K Pot. |
| 2020/08/17 (Mon) | Tower = 51 mK. Take 0V, +75V data - no spiky junk seen. Add more 4He to mixture. Try to cool down, stuck at 0.4 K |
| 2020/08/16 | Tower = 50-55 mK. Powercycle DCRC1. Take 0V data, see restored gain. Take +100V data, see spiky noise events. |
| 2020/08/15 | Tower = 52 mK. Take +75V, 0V data. Reduced gains seen in only DCRC1. |
| 2020/08/14 | Tower = 53-60 mK. Take +40V data with no Ebox purge. MIDAS crash. Spiky low-energy junk events seen. Take 0V data. Take +40V, +75V data. Reduced gain seen. Perform another hot Al flash. |
| 2020/08/13 | Tower = 55-58 mK. Take -75V. Try source mover (+4 and -4 steps), tower temperature spikes to 760 mK. Take +40V data with Ebox purge off. Perform hot Al flash. |
| 2020/08/12 | Tower = 52-58 mK. Take +75V prebiased, -50V, -75V data |
| 2020/08/11 | Tower = 52-56 mK. Take +50V, +75V data. MIDAS crash. |
| 2020/08/10 (Mon) | Tower = 53-57 mK. Take +40V prebiased data, +50V data |
| 2020/08/09 | Tower = 52-58 mK. Take +30V, +40V data |
| 2020/08/08 | Tower = 52-58 mK, trouble keeping it low. Perform IbIs at 57 mK. Take -30V, +30V drifted data. |
| 2020/08/07 | Take -20V, -30V drifted data. Some difficulty keeping Tower temperature down. |
| 2020/08/06 | Tower = 52 mK. Take -20V drifted data. |
| 2020/08/05 | Take 15V, 20V drifted data. |
| 2020/08/04 | Tower = 51 mK. Take 0V, -15V, 15V drifted data. Instability in HV seen. |
| 2020/08/03 (Mon) | Tower = 52 mK. Perform IbIs. Take -10V drifted data. Variations in sequencer lag. |
| 2020/08/02 | Tower = 50 mK. Take 10V, -10V drifted data. Test source mover motor control. |
| 2020/08/01 | Take 5V drifted data. Test source mover motor control. |
| 2020/07/31 | Tower = 51 mK. Take 5V drifted data with sequence variations. |
| 2020/07/30 | Tower = 52 mK. Take 0V/10V/0V constant data.Take 5V drifted data with sequence variations |
| 2020/07/29 | Tower = 52 mK. Take +5V drifted, -5V drifted, 0V/-10V/0V constant data. |
| 2020/07/28 | Tower = 53 mK. Take 0V and 5V drifted data. |
| 2020/07/27 (Mon) | Tower = 52 mK. Reattach pi-filters, phonon noise improves. IbIs. Take 0-Volt data. Bake detector for 1 hour. |
| 2020/07/26 | Tower = 53 mK. Find that DCRC55(1) powers up again. Take 0-Volt data |
| 2020/07/25 | Tower→53 mK. Test external source mover, can control directly from a Windows computer (not through network). Find that DCRC50(3) does not drive LEDs properly. Stop circulation and warm Tower to 1.3 K, then cool fridge again. |
| 2020/07/24 | Tower→55 mK. Finish IbIs. Take 0-Volt data, find much worse noise sigma, much lower gain than Run72. (still haven't attached pi-filters) |
| 2020/07/23 | Tower→57 mK. Tune some SQUIDs. Seeing ugly noise (still haven't replaced pi-filters). Begin IbIs. |
| 2020/07/22 | Tower→61 mK. Start purging E-box with N2 |
| 2020/07/21 | Tower→62 mK. Recalibrate HV. |
| 2020/07/20 (Mon) | Tower 66-70 mK, not stable. Take 0-Volt data, see jagged noise. Note: pi-filters were inadvertently not attached. |
| 2020/07/19 | Tower→70 mK. Find that DCRC55(1) will not power up |
| 2020/07/18 | Start circulation. MC→32.2 mK |
| 2020/07/17 | Initial LHe transfer, using new one-person method. |
| 2020/07/16 | Cryoclean mixture, tape plastic over stripline elbow. Transfer LN2. |
between-run activity
| 2020/07/15 | Cryoclean mixture |
| 2020/07/14 | Leakcheck T-pipe by itself. Try a Q-compound test: it doesn't look like Q-compound reduces a leak, looks as though He goes right through it |
| 2020/07/10 | Disassemble E-box again, try leakchecking T-pipe by itself |
| 2020/07/07 | Leak still present near stripline elbow |
| 2020/07/01 | Move steel plates for PuBe storage shielding into PAN 443. Disassemble E-box to replace stripline elbow KF-flange o-ring. |
| 2020/06/30 | Add Q-compound to stripline elbow |
| 2020/06/29 | Add Q-compound to stripline elbow |
| 2020/06/25 | Leak seen at stripline elbow |
| 2020/06/24 | Polish surfaces of KF flange at stripline elbow |
| 2020/06/22 | Leak seen at KF flange at stripline elbow |
| 2020/06/19 | Clean surfaces of KF flange at stripline elbow |
| 2020/06/17 | |
| 2020/06/15 | Add Q-compound to stripline elbow |
| 2020/06/11 | Add Q-compound to stripline elbow |
| 2020/06/08 | Add Q-compound to stripline elbow |
| 2020/06/05 | Start adding Q-compound to stripline elbow to block leak |
| 2020/06/03 | Let IVC up to 1atm and adjust stripline elbow position. |
| 2020/05/21 | Cryoclean mixture. Leak near stripline elbow returns. Build hooks for LHe transfer line. |
| 2020/05/20 | Cryoclean mixture. Design hooks to hang LHe transfer line for one-person transfers |
| 2020/05/19 | Leak check IVC at top of fridge. No leaks seen. |
| 2020/05/18 | Attempt to improve stripline tube seal at top of fridge |
| 2020/05/12 | Reassemble and test leak detector with repaired pump |
| 2020/03/22 | |
| 2020/03/21 | |
| 2020/03/20 | |
| 2020/03/19 | |
| 2020/03/18 | |
| 2020/03/17 | Put lab into Covid-19 hibernation |
Run 72
| Run | Det | Det Type | Source | Purpose |
|---|---|---|---|---|
| 72 | G101D | 100mm Ge HV | Unshielded Am, movable | Test GeHV with etched side 2 and movable source with solder joint heat sinking |
| 2020/03/16 (Mon) | |
| 2020/03/15 | Start warmup |
| 2020/03/14 | Start circulation. 1K Pot working much better. MC temperature unstable, suggesting helium in IVC |
| 2020/03/13 | Initial LHe transfer |
| 2020/03/12 | Transfer LN2 |
| 2020/03/11 | Continue warmup. Flush 1KPot. Cryoclean mixture. |
| 2020/03/10 | Attempt to measure capacitance of detector+electrode. Continue warmup, soften cryostat vacuum jacket |
| 2020/03/09 (Mon) | Attempt to use source mover, but there are network problems, can't connect. Begin warmup - switch to one-shot mode, stop 1K Pot |
| 2020/03/08 | Tower 72-81 mK |
| 2020/03/07 | Tower 59-72 mK. Check HV at Ebox some more. |
| 2020/03/06 | Tower = 52 mK. Check HV at the Ebox, investigating too-low Luke gain. Tower temperature rises to 66 mK |
| 2020/03/05 | Tower = 57 mK. Take 100V-drifted, -250V-drifted data. |
| 2020/03/04 | Tower = 52 mK. IbIs measurements. Take 0V, 300V-drifted, 150V-drifted data |
| 2020/03/03 | Tower = 51 mK. Take 200V-drifted data |
| 2020/03/02 (Mon) | Build lead/poly tower shield. Take 250V-drifted data. |
| 2020/03/01 | Tower = 55 mK |
| 2020/02/29 | Still pressure/temperature suddenly fall to lower baseline. Temporary problem with LakeShore bridge thermometer readings |
| 2020/02/28 | Take 300V-drifted data |
| 2020/02/27 | Tower → 53 mK. Take 300V-drifted data |
| 2020/02/26 | Tower → 54 mK. Take 250V- and 300V-drifted data |
| 2020/02/25 | Tower → 55 mK. Calibrate remote HV. Take 180V-drifted data |
| 2020/02/24 (Mon) | Tower → 57 mK. Take 0-Volt data |
| 2020/02/23 | Tower → 58 mK |
| 2020/02/22 | Tower → 61 mK |
| 2020/02/21 | Tower → 64 mK. Find that Side1pE is inoperative. |
| 2020/02/20 | Tower → 67 mK. Test motor coils with DC current. |
| 2020/02/19 | Begin circulation. Tower → 72 mK. Test screw terminals. |
| 2020/02/18 | Initial LHe transfer |
| 2020/02/17 (Mon) | Transfer LN2 |
| 2020/02/16 | |
| 2020/02/15 | |
| 2020/02/14 | Install tower, pump out IVC |
| 2020/02/13 | Prepare threaded rods for stack. Assemble tower. Repair one broken detector wirebond. |
| 2020/02/12 | Cryoclean mixture. |
| 2020/02/11 | Cryoclean mixture. Build SQUET/stripline interposer for source mover, screw terminals, HV electrode wiring. |
| 2020/02/10 (Mon) | Cryoclean mixture. Assemble source mover and other accessories in housing. Realize we don’t have threaded rods long enough for 3 housing stack. |
| 2020/02/09 | |
| 2020/02/08 | |
| 2020/02/07 | Cryoclean mixture. Build twisted-pair substitute for a side coax. Build Al screw terminal test rig for NbTi wiring. |
| 2020/02/06 | Cryoclean mixture. Mount LEDs. Remove G132 from its housing. |
| 2020/02/05 | Heatsink source mover motor solder joints. Re-wirebond G101. |
| 2020/02/04 | Modified G101 arrives, most wirebonds are broken |
| 2020/02/03 (Mon) | Disassemble source mover motor |
| 2020/01/27 | Checking the longer side coaxes |
| 2020/01/22 | Updates on G101c Side2 etching |
| 2020/01/15 | Package G101c and ship it to TAMU to have the Side2 channels etched away |
| 2020/01/07 | Move howitzer (PuBe storage) from Tate to PAN 443. The PuBe source is now officially ours. |
| 2020/01/06 | Update DCRC IP addresses |
Run 71
| Run | Det | Det Type | Source | Purpose |
|---|---|---|---|---|
| 71 | G106a | 100mm iZIPv6 | Unshielded Am, movable | test movable source |
| 2019/12/12 | |
| 2019/12/11 | Remove tower. |
| 2019/12/09 (Mon) | Begin deinstallation. |
| 2019/12/02 (Mon) | |
| 2019/11/26 | |
| 2019/11/25 (Mon) | Move source in -y direction all the way to endstop. Begin warmup. |
| 2019/11/24 | Move source further in -y direction. |
| 2019/11/23 | Tower reaches 32 mK. Move source 0.5 mm, then another 0.5 mm, determine that it is past the blocker. Move source further in -y direction. |
| 2019/11/22 | Tower reaches 33 mK. Move source over a blocker, verify decrease in 60keV rate. Move 0.5 mm further. |
| 2019/11/21 | Unjam source mover by increasing current. Start moving source in -y direction. |
| 2019/11/20 | Move source into the +y endstop. Determine that source is jammed, won't move backward. |
| 2019/11/19 | First clear evidence that source moved. Move source further in +y direction |
| 2019/11/18 (Mon) | Start using source mover in multiple short steps. |
| 2019/11/17 | |
| 2019/11/16 | Tower reaches 34 mK. Take some -4/+4V and +4/-4V data. |
| 2019/11/15 | Study heating versus current applied to stepper motor. |
| 2019/11/14 | Tower reaches 35 mK. Move source to a total of 862 steps, s/b 14.3 mm. Scope measurements suggest motor only moves a few steps each time it's operated. |
| 2019/11/13 | Tower reaches 36 mK. Restore phonon collection efficiency with Al flash. No clear evidence yet that source is moving. |
| 2019/11/12 | Tower reaches 37 mK. Fix MIDAS biasing glitch. Try moving source farther. Quantify loss in phonon collection efficiency. |
| 2019/11/11 (Mon) | Tower reaches 38 mK. Develop hotter LED flash to remove trapped flux in Al fins. |
| 2019/11/10 | Tower reaches 39 mK. More bias scan data with incorrect biasing. |
| 2019/11/09 | Take bias scan data. MIDAS glitch causes incorrect detector biasing. |
| 2019/11/08 | Tower reaches 42 mK. Try source mover. Heats tower above 1 K. |
| 2019/11/07 | Tower reaches 43 mK. Take some bias scan data. |
| 2019/11/06 | Begin circulation. Tower reaches 46 mK. |
| 2019/11/05 | Initial LHe transfer |
| 2019/11/04 (Mon) | Transfer LN2 |
| 2019/11/01 | Open IVC. Polish flanges. Reseal IVC. Begin IVC pumpout. |
| 2019/10/31 | Cryoclean mixture |
| 2019/10/30 | Blow out LN2. Discover leak into IVC. Begin warmup |
| 2019/10/29 | Transfer LN2 |
| 2019/10/28 (Mon) | Cryoclean mixture |
| 2019/10/25 | Repair SQUET ZC-74 with jumpers. Begin IVC pumpout. |
| 2019/10/24 | Finish tower installation. More connection problems with SQUET ZC-74 |
| 2019/10/23 | |
| 2019/10/22 (Tue) | Receive Tower T1 back from TAMU. Rebuild tower. |
| 2019/10/16 | |
| 2019/10/15 | Tower IT4 breaks! Send 3“ diameter housings to TAMU. |
| 2019/10/14 (Mon) | Finish tower assembly |
| 2019/10/11 | |
| 2019/10/10 (Thu) | |
| 2019/10/04 | Find broken part of movable source potentiometer. Rebuild source mover with no potentiometer, add endpoint sensors |
| 2019/10/03 | Drop main bath. IVC leak not visible at room temperature. Remove tower. |
| 2019/10/02 | |
| 2019/10/01 | Let N2 into cryostat vacuum jacket to accelerate warmup |
| 2019/09/30 (Mon) | At 124 K IVC leak smaller but present, probably located below top of main bath fill funnel. |
| 2019/09/29 | |
| 2019/09/28 | |
| 2019/09/27 | |
| 2019/09/26 | |
| 2019/09/25 | Start warmup. Check SQUIDs at 4K. |
| 2019/09/24 | Start 1K Pot. Can't cool below 3K, apparently because of IVC leak |
| 2019/09/23 (Mon) | Initial LHe transfer. Evidence of leak into IVC. Stepper motor for movable source appears to be stuck. |
| 2019/09/22 | Transfer more LN2. |
| 2019/09/21 | Successful 77K throughput test. Some issues with electrical checkout. |
| 2019/09/20 | Transfer LN2. Throughput test at 300 K (room temperature) |
| 2019/09/19 | Repair SQUET ZC-74 with external wires. Finish tower installation. Pump out IVC. |
| 2019/09/18 | Cryoclean mixture. Install tower. Connection problems with SQUET ZC-74. |
| 2019/09/17 | Cryoclean mixture. Drill larger (18 mil) hole for small lead collimator for bare smoke-detector Am source. Mount movable source. Assemble tower. |
| 2019/09/16 (Mon) | Cryoclean mixture. Modify SQUET ZC-74 back to 20 mOhm shunts |
Run 70
| Run | Det | Det Type | Source | Purpose |
|---|---|---|---|---|
| 70 | G101c (aka “HV #2”) | SNOLAB HV prototype | Unshielded Am | n,gamma coincidence NR calibration attempt with vacuum interface and modified HV wiring |
| 2019/09/12 | |
| 2019/09/11 | |
| 2019/09/10 | |
| 2019/09/09 (Mon) | |
| 2019/09/08 | |
| 2019/09/07 | |
| 2019/09/06 | Start warmup. |
| 2019/09/05 | |
| 2019/09/04 | |
| 2019/09/03 | |
| 2019/09/02 (Mon) | |
| 2019/09/01 | |
| 2019/08/31 | |
| 2019/08/30 | |
| 2019/08/29 | |
| 2019/08/28 | |
| 2019/08/27 | |
| 2019/08/26 (Mon) | |
| 2019/08/25 | |
| 2019/08/24 | |
| 2019/08/23 | |
| 2019/08/22 | |
| 2019/08/21 | |
| 2019/08/20 | |
| 2019/08/19 (Mon) | |
| 2019/08/18 | |
| 2019/08/17 | |
| 2019/08/16 | |
| 2019/08/15 | |
| 2019/08/14 | |
| 2019/08/13 | |
| 2019/08/12 (Mon) | |
| 2019/08/11 | |
| 2019/08/10 | |
| 2019/08/09 | Remove PuBe from lab |
| 2019/08/08 | |
| 2019/08/07 | |
| 2019/08/06 | |
| 2019/08/05 (Mon) | |
| 2019/08/04 | |
| 2019/08/03 | |
| 2019/08/02 | |
| 2019/08/01 | |
| 2019/07/31 | |
| 2019/07/30 | |
| 2019/07/29 (Mon) | |
| 2019/07/28 | |
| 2019/07/27 | |
| 2019/07/26 | |
| 2019/07/25 | |
| 2019/07/24 | |
| 2019/07/23 | |
| 2019/07/22 (Mon) | |
| 2019/07/21 | |
| 2019/07/20 | |
| 2019/07/19 | Repair Pfeiffer vacuum gauge, put it back on the turbo pump station. |
| 2019/07/18 | Cool back down to base of 40 mK |
| 2019/07/17 | Cool down again after fridge failure |
| 2019/07/16 | Fridge failure: pumps shut down after power interruption |
| 2019/07/15 (Mon) | Activate detector with PuBe for 15.75 hours. |
| 2019/07/14 | |
| 2019/07/13 | |
| 2019/07/12 | |
| 2019/07/11 | |
| 2019/07/10 | |
| 2019/07/09 | |
| 2019/07/08 (Mon) | |
| 2019/07/07 | |
| 2019/07/06 | |
| 2019/07/05 | Activate detector with PuBe for 3.5 hours. |
| 2019/07/04 | |
| 2019/07/03 | |
| 2019/07/02 | |
| 2019/07/01 (Mon) | Take 180→400V data w/rate: 2.49V/min. |
| 2019/06/30 | Take 180→400V data w/rate: 2.49V/min. |
| 2019/06/29 | Take 180→400V data w/rate: 2.49V/min. |
| 2019/06/28 | Take 180→400V data w/rate: 2.49V/min. |
| 2019/06/27 | Take 180→400V data w/rate: 2.49V/min. |
| 2019/06/26 | Take 180→400V data w/rate: 2.49V/min. |
| 2019/06/25 | Take 180→400V data w/rate: 2.49V/min. Apply heat to still |
| 2019/06/24 (Mon) | Take 180→400V data w/rate: 2.49V/min |
| 2019/06/23 | Tower→40mK. Take 180→400V data w/rate 2.49V/min |
| 2019/06/22 | Tower→41mK. Take 180→400V data w/rate 2.49V/min |
| 2019/06/21 | Tower→41mK. Take 0V data, take 0V unplugged data |
| 2019/06/20 | Tower→41mK. Take 100V, 180V, 220V, & 300V data. |
| 2019/06/19 | Tower→42mK. Take 180→400V data w/rate: 2.52V/min |
| 2019/06/18 | Tower→41mK. Add PuBe source. Take 180→400V data w/rate 2.52V/min |
| 2019/06/17 (Mon) | Tower→41mK. Take 0V data & 180→400V w/rate 2.52V/min |
| 2019/06/16 | Take 180→400V data w/rate: 2.418V/min |
| 2019/06/15 | Tower → 41mK. Take 180→400V data w/rate: 2.418V/min |
| 2019/06/14 | Tower → 42mK. |
| 2019/06/13 | Tower→42mK. Take 220→400V data w/rate: 2.418V/min & 160→220V data w/rate: 2.418V/min & 140→400V w/rate 2.418V/min & 0V data |
| 2019/06/12 | Tower→42mK. Take -200→-400V data w/rate: -2.418V/min & -200→-400V w/rate: -2.796V/min & -180→-400V w/rate: -2.418 & -220→400V w/rate: -2.418V/min |
| 2019/06/11 | Tower→43mK. Take 200→400V data w/rate: 2.34V/min |
| 2019/06/10 (Mon) | Tower→43mK. Bad data taken (triggering off) |
| 2019/06/09 | Tower→44mK. Take 200→400V data w/rate: 2.64 V/min |
| 2019/06/08 | Tower → 44mK. Take 200→400V data w/rate: 2.64V/min |
| 2019/06/07 | Tower → 45 mK. Take 250→400V data w/rate: 3.9V/min & 200→400V w/rate: 2.76V/min. Build lead/poly fridge shield. |
| 2019/06/06 | Tower → 46 mK. Take 200→400V data w/rate: 3.9V/min |
| 2019/06/05 | Tower → 46 mK. Take 300→400V data w/rate:3.9V/min |
| 2019/06/04 | Tower → 47 mK. Take 300→400V data w/rate: 3.9V/min |
| 2019/06/03 (Mon) | Tower → 48mK. Take constant -125V data, 300→400V data w/rate: 3.9V/min |
| 2019/06/02 | Tower → 50 mK. |
| 2019/06/01 | Tower → 51mK. Take 0V data. |
| 2019/05/31 | Tower → 54 mK. Take constant 125V data. |
| 2019/05/30 | Tower → 56 mK.Take 0V data. |
| 2019/05/29 | Tower → 59 mK. First pulses. |
| 2019/05/28 | Tower → 62 mK |
| 2019/05/27 (Mon) | Tower → 68 mK. Slow cooling this run. MC = 32 mK |
| 2019/05/26 | Tower → 73 mK. |
| 2019/05/25 | Start 1K Pot, start circulation. Tower → 78 mK |
| 2019/05/24 | LHe transfer |
| 2019/05/23 | LN2 transfer |
| 2019/05/22 | Cryoclean mixture |
| 2019/05/21 | |
| 2019/05/20 | 1K pot blockage, warming back up |
| 2019/05/19 | LHe transfer |
| 2019/05/18 | LN2 transfer |
| 2019/05/17 | Cryoclean mixture. |
| 2019/05/16 | Cryoclean mixture. |
| 2019/05/15 | Discover blockage at 77K |
| 2019/05/14 | |
| 2019/05/13 (Mon) | |
| 2019/05/12 | |
| 2019/05/11 | |
| 2019/05/10 | Cryoclean mixture. |
| 2019/05/09 | Leak check the Still Pumping Line, find a leak, replace some o-rings. |
| 2019/05/08 | Another blockage found. Throughput tests at 77K and 120K, blocked both times. Start warming up again. |
| 2019/05/07 | LN2 transfer (third try) |
| 2019/05/06 (Mon) | Cryoclean mixture. |
| 2019/05/05 | |
| 2019/05/04 | |
| 2019/05/03 | Cryoclean mixture. |
| 2019/05/02 | Throughput test at 228 K, looks ok. Cryoclean mixture. |
| 2019/05/01 | Another fridge blockage. Identify problem with rough pump in leak detector. |
| 2019/04/30 | 3He pump failure - turns out to be relay in power box, switch to spare. LN2 transfer. |
| 2019/04/29 (Mon) | Cryoclean mixture |
| 2019/04/28 | |
| 2019/04/27 | |
| 2019/04/26 | Discover blockage. Let gas in cryostat vacuum jacket to warm up. |
| 2019/04/25 | LN2 transfer |
| 2019/04/24 | Raise dewar, begin cleaning mix. |
| 2019/04/23 | Tower installation |
| 2019/04/22 (Mon) | SQUET modifications. Begin tower install. |
| 2019/04/19 | Tower modifications. |
| 2019/04/18 | Begin tower deinstallation |
Run 69
| Run | Det | Det Type | Source | Purpose |
|---|---|---|---|---|
| 69 | G101c (aka “HV #2”) | SNOLAB HV prototype | Unshielded Am | n,gamma coincidence NR calibration attempt with vacuum interface |
| 2019/04/17 | |
| 2019/04/16 | Room temp electrical check. |
| 2019/04/15 (Mon) | Continue warmup. Pump on dewar jacket. |
| 2019/04/14 | Continue warmup. Pump on dewar jacket. |
| 2019/04/13 | |
| 2019/04/12 | Continue warmup. Work on 4He pump rebuild. |
| 2019/04/11 | Continue warmup. |
| 2019/04/10 | Continue warmup. Let helium into cryostat vacuum jacket for fast warmup. |
| 2019/04/09 | Electrical checks, find some SQUET damage. Begin warmup. |
| 2019/04/08 (Mon) | HV leakage tests, suggest leakage is in SQUETs |
| 2019/04/07 | Heat MC to try to avoid QET oscillations |
| 2019/04/06 | Take 60 → 120V data. |
| 2019/04/05 | Severe HV leakage returns. Evidence of damage to SQUETs. |
| 2019/04/04 | Take -300 → -400V data, constant -300V and 300V data with in-run randoms, 300 → 400V data. Lower Am lines visible. |
| 2019/04/03 | Tune some SQUIDs. 0V and constant 300V and -300V data. |
| 2019/04/02 | IbIs. Try to find good QET settings without oscillations. Tower = 40 mK. |
| 2019/04/01 (Mon) | |
| 2019/03/31 | Take background data at 300→400 V. mhttpd crash problem seemingly improved by adjusting ODB settings |
| 2019/03/30 | Take background data at 300→400 V |
| 2019/03/29 | Take background data at 300→400 V |
| 2019/03/28 | HV leakage much improved after HV board mod |
| 2019/03/27 | Modify HV board: disconnect all HV connections to non-used channels. Discover pA is now broken. |
| 2019/03/26 | Severe HV leakage at 400V. |
| 2019/03/25 (Mon) | Return PuBe source to Tate. |
| 2019/03/24 | HV leakage gets worse |
| 2019/03/23 | |
| 2019/03/22 | HV leakage starts getting worse |
| 2019/03/21 | PuBe data. MIDAS mhttpd keeps crashing. |
| 2019/03/20 | Bring PuBe source into lab. Start PuBe data taking at 300→400 V. |
| 2019/03/19 | Finish lead/poly shield. Bg rate = 46 Hz. Take bg data at HV = 201 V. |
| 2019/03/18 (Mon) | Tower reaches 44.1 mK. Take superconducting and normal noise data. Bg rate = 99 Hz. Begin installing lead/poly shield. |
| 2019/03/17 | Tower reaches 44.8 mK |
| 2019/03/16 | Tower reaches 45.7 mK |
| 2019/03/15 | Tower reaches 47.5 mK. Take bg data with increasing HV bias. Calibrate remote HV to 440V. |
| 2019/03/14 | Tower reaches 47.8 mK. Test HV to 400 V. Build lead stack for PuBe gamma shield. |
| 2019/03/13 | Tower reaches 51.1 mK. Test data with constantly increasing HV bias. Confirm 4He Pump oil filter causes recovery leak. |
| 2019/03/12 | Tower reaches 52.5 mK. Test data at 190 V. |
| 2019/03/11 (Mon) | Tower reaches 55.7 mK. First pulses. HV test to 200 V |
| 2019/03/10 | Tower reaches 57.1 mK |
| 2019/03/09 | Tower reaches 61.7 mK |
| 2019/03/08 | Tower reaches 65.2 mK |
| 2019/03/07 | Start circulation. Tower reaches 71.2 mK |
| 2019/03/06 | Initial LHe transfer. HPGe detector size measurements. |
| 2019/03/05 | Transfer LN2. Set up HPGe detector for detector size measurements |
| 2019/03/04 (Mon) | Install tower, start IVC pumpout |
| 2019/03/03 | |
| 2019/03/02 | Put Cf source on tower in purge cabinet |
| 2019/03/01 | Assemble tower. |
| 2019/02/28 | Modify tower crown to mount LEDs |
| 2019/02/27 | Cryoclean mixture. Mount 100mm electrode. Re-discover that G101c has no internal LEDs - we will need to mount external ones somehow |
| 2019/02/26 | Cryoclean mixture. Make 20-mil spacers. |
| 2019/02/25 (Mon) | |
| 2019/02/22 | Start to mount 100mm external electrode, but realize we don't have the right clamps & spacers. |
| 2019/02/21 | Deinstall, remove tower from fridge. |
| 2019/02/19 | Disassemble lead stack, stack bricks against West wall. |
| 2019/02/18 | Remove wirebonds from Side 2 of GeHV detector (G101c). Return G101c to source safe for activation |
| 2019/02/15 | Put GeHV detector (G101c) in source safe with Cf-252 source for activation. |
between-run activity
| 2019/02/07 | more DCRC tests. |
| 2019/02/05 | Try to reproduce DCRC glitches on the bench. |
| 2019/02/04 | Try to reproduce DCRC glitches on the bench. |
| 2019/01/22 | Put PuBe source in lab for some measurements with the NaI detectors. |
| 2019/01/02 | Put PuBe source in lab for some measurements with the NaI detectors. |
| 2018/12/14 | Get PuBe source from Tate, put in 4th floor lead-lined storage. |
Run 68
| Run | Det | Det Type | Source | Purpose |
|---|---|---|---|---|
| 68 | S101 (aka “HV #4”) | SNOLAB HV prototype | Unshielded Am | n,gamma coincidence NR calibration attempt with reduced shunt resistances |
| 2018/10/19 | |
| 2018/10/18 | |
| 2018/10/17 | |
| 2018/10/16 | |
| 2018/10/15 (Mon) | |
| 2018/10/14 | |
| 2018/10/13 | |
| 2018/10/12 | |
| 2018/10/11 | |
| 2018/10/10 | Stop circulation. Begin warmup. |
| 2018/10/09 | |
| 2018/10/08 (Mon) | |
| 2018/10/07 | |
| 2018/10/06 | |
| 2018/10/05 | |
| 2018/10/04 | |
| 2018/10/03 | |
| 2018/10/02 | |
| 2018/10/01 (Mon) | |
| 2018/09/30 | |
| 2018/09/29 | |
| 2018/09/28 | |
| 2018/09/27 | |
| 2018/09/26 | |
| 2018/09/25 | |
| 2018/09/24 (Mon) | |
| 2018/09/23 | |
| 2018/09/22 | Start taking -125 V data |
| 2018/09/21 | |
| 2018/09/20 | |
| 2018/09/19 | |
| 2018/09/18 | |
| 2018/09/17 (Mon) | |
| 2018/09/16 | |
| 2018/09/15 | |
| 2018/09/14 | |
| 2018/09/13 | |
| 2018/09/12 | |
| 2018/09/11 | IbIs data at -80V |
| 2018/09/10 (Mon) | IbIs data at -80V |
| 2018/09/09 | Take -80V bkg data. |
| 2018/09/08 | Take -80V bkg data. |
| 2018/09/07 | Take -80V bkg data. |
| 2018/09/06 | Take -80V PuBe data with PuBe removed from paraffin barrel |
| 2018/09/05 | Take -80V PuBe data with PuBe removed from paraffin barrel |
| 2018/09/04 | Take -80V PuBe data. |
| 2018/09/03 (Mon) | Take -80V PuBe data. |
| 2018/09/02 | Take -80V bkg data. |
| 2018/09/01 | Take -80V bkg data. |
| 2018/08/31 | Take -70,-80 V bkg data |
| 2018/08/30 | Take -Vbias scan bkg data. |
| 2018/08/29 | Take +/-40V bkg data. |
| 2018/08/28 | Take 40V PuBe/bkg data. |
| 2018/08/27 (Mon) | Take 40V PuBe data. |
| 2018/08/26 | Take 40V PuBe data. |
| 2018/08/25 | Take 40V PuBe data. |
| 2018/08/24 | Take 40V PuBe data and NaI calibration data. |
| 2018/08/23 | Take 40V PuBe data. |
| 2018/08/22 | Take 40V PuBe data. |
| 2018/08/21 | Take 40V PuBe data. |
| 2018/08/20 (Mon) | Take 40V bkg and PuBe data. |
| 2018/08/19 | Take 40V bkg data. |
| 2018/08/18 | Take 40V bkg data. |
| 2018/08/17 | Take 40V bkg data. |
| 2018/08/16 | Take NaI calibration data. Take 40V bkg data. |
| 2018/08/15 | Take 40V PuBe and bkg data. |
| 2018/08/14 | Take 40V PuBe data. |
| 2018/08/13 (Mon) | Take 40V PuBe data. |
| 2018/08/12 | Take 40V PuBe data. |
| 2018/08/11 | Take 40V PuBe data. |
| 2018/08/10 | Take 40V PuBe data. |
| 2018/08/09 | Take 40V PuBe data. |
| 2018/08/08 | Take 40V bkg and PuBe data |
| 2018/08/07 | Take 40V bkg data. |
| 2018/08/06 (Mon) | Cool to base. Take bias scan data. |
| 2018/08/05 | |
| 2018/08/04 | |
| 2018/08/03 | |
| 2018/08/02 | Blow out LN2. 77K leak check, electrical check, throughput test all OK.Initial LHe transfer. |
| 2018/08/01 | Cryoclean mixture. Transfer LN2. |
| 2018/07/31 | More leak checks, none seen. Cryoclean mixture. |
| 2018/07/30 (Mon) | Room temperature leak checks from bath to IVC, fridge lines to IVC, fridge top to IVC, none seen |
| 2018/07/27 | Electrical check @ 210 K, looks OK. Leak check from bath to IVC, none detected. |
| 2018/07/26 | Warmup. Accidentally let air into IVC @ 9K. |
| 2018/07/25 | Continue thermal tests of helium in IVC |
| 2018/07/24 | Watch changes in temperatures and IVC pressure during transfers, investigating helium leak into IVC |
| 2018/07/23 (Mon) | Suspend circulation and 1K Pot, warm tower with heaters, see evidence of helium in IVC again |
| 2018/07/22 | Base becomes unstable, Tower rises above 100 mK |
| 2018/07/21 | Helium film noise now gone, take data at 0V and 40V |
| 2018/07/20 | Cool to base again, reach 29.5 mK at tower |
| 2018/07/19 | Warm fridge while pumping on IVC, thermal connection broken. Clear indication of helium in IVC |
| 2018/07/18 | Suspend circulation and 1KPot, warm fridge with IVC isolated - thermal connection to bath evident |
| 2018/07/17 | Take 0V and 40V data with helium film noise present. 1K Pot failure overnight. |
| 2018/07/16 (Mon) | Discover jagged noise, later identified as helium films |
| 2018/07/15 | |
| 2018/07/14 | |
| 2018/07/13 | |
| 2018/07/12 | |
| 2018/07/11 | |
| 2018/07/10 | Tower base around 33 mK |
| 2018/07/09 (Mon) | Mount NaI detectors. Take IbIs data @ 40V |
| 2018/07/08 | Finish reestablishing circulation, Tower reaches 30 mK with DCRCs on |
| 2018/07/07 | Slowly reestablishing circulation. Seems stuck at 1K, then pressures start oscillating, then finally starts to cool again, reaches 29 mK |
| 2018/07/06 | Try closing then reopening V6: doesn't help. Stop circulation, warm to 8 K, restart circulation. Tower falls to 200 mK but then rises again. Stop circulation again. Throughput test at 10 K. Restart circulation slowly - Tower never falls below 1 K |
| 2018/07/05 | Tower temperature rises to 60 mK. Stop circulation, warm to 6 K, restart circulation. Can't cool below 1 K |
| 2018/07/04 | Tower temperature wavering between 32 and 36 mK |
| 2018/07/03 | 1K Pot runs dry, fridge failure. Restart circulation. Cool to 30 mK. Lower transfer stick a little early during LHe transfer, thermal shock. After that, base temperature less stable. |
| 2018/07/02 (Mon) | 1K pot still unstable, needle valve needs to be tweaked open every several hours. 50V data with and without flashing |
| 2018/07/01 | HV-scan data |
| 2018/06/30 | Take 70V data |
| 2018/06/29 | Take noise data, take 0V pulse data, bring PuBe neutron source into lab. LHe transfer without blowoff using long extender. |
| 2018/06/28 | Tower <35 mK with DCRCs off. 1K pot semi-unstable. Construct 1T lead shield. |
| 2018/06/27 | Tower 44-45 mK with DCRCs on. Still heating reduces temperature to 37 mK but then uncontrolled rise. One-shot test. Build lead/poly shield |
| 2018/06/26 | Turn on DCRCs. Tower 45-50 mK |
| 2018/06/25 (Mon) | Add 13.7 mbar 4He to mixture. Restart circulation. Overnight temperature oscillations, 36-55 mK |
| 2018/06/24 | Tower around 80 mK |
| 2018/06/23 | |
| 2018/06/22 | Overnight temperature oscillations, 37-52 mK. One-shot test. Restart circulation |
| 2018/06/21 | Clean 4He cold trap. Restart circulation. |
| 2018/06/20 | Cooling power test, much worse than it should be |
| 2018/06/19 | Adjust still heat, 1K Pot, can't get base better than 38 mK (with DCRCs off) |
| 2018/06/18 (Mon) | Start DCRCs. About 30 min later Tower rises to 100 mK. |
| 2018/06/17 | Tower stable overnight ~ 38 mK |
| 2018/06/16 | Tower stable overnight ~ 40 mK |
| 2018/06/15 | More tower temperature oscillations |
| 2018/06/14 | Tower temperature oscillates between 40 and 52 mK |
| 2018/06/13 | Restart circulation. |
| 2018/06/12 | Stop and restart circulation. Try to improve base temperature |
| 2018/06/11 (Mon) | Restart circulation. Tower reaches 35 mK. But after transfer Tower rises to 100 mK. |
| 2018/06/10 | |
| 2018/06/09 | Transfer LHe without “precool” (waiting for plume) |
| 2018/06/08 | Stop circulation |
| 2018/06/07 | 1K Pot failure, circulation pressures rise above 1 bar. Struggle with 1K Pot |
| 2018/06/06 | 1K Pot problems, keeps running dry |
| 2018/06/05 | Attempt 100V data with flashing |
| 2018/06/04 (Mon) | Set up remote biasing, take bias-sweep data |
| 2018/06/03 | Tower reaches 35.2 mK. Take data at 60V. |
| 2018/06/02 | Take data at 80V |
| 2018/06/01 | Take data at 100V |
| 2018/05/31 | IbIs measurements. Begin nitrogen purge at ebox. |
| 2018/05/30 | Automated IbIs measurements at 0V. Tower reaches 38.8 mK |
| 2018/05/29 | See first pulses. Troubleshoot HV biasing. |
| 2018/05/28 (Mon) | Tower reaches 41.4 mK |
| 2018/05/27 | Tower reaches 44.7 mK |
| 2018/05/26 | Tower reaches 46.5 mK |
| 2018/05/25 | Start circulation. Tower reaches 51.3 mK |
| 2018/05/24 | Initial LHe transfer |
| 2018/05/23 | Cryoclean mixture. Transfer LN2 |
| 2018/05/22 | Cryoclean mixture |
| 2018/05/21 (Mon) | |
| 2018/05/18 | Replace o-rings on 1K Pot needle valve shaft |
| 2018/05/17 | |
| 2018/05/16 | 1K Pot not working. Begin warmup |
| 2018/05/15 | Initial LHe transfer |
| 2018/05/14 (Mon) | Cryoclean mixture. Transfer LN2 |
| 2018/05/13 | |
| 2018/05/12 | Fridge blockage. Begin warmup. |
| 2018/05/11 | Cryoclean mixture. Transfer LN2 |
| 2018/05/10 | Open IVC and look for touch - none found. Seal and pump out IVC |
| 2018/05/09 | Warm up fridge |
| 2018/05/08 | MC will not cool much below 4K. Suspect a touch from 4K to 100mK stages |
| 2018/05/07 (Mon) | Start 1K Pot, cooling slow, 1K pot cools only to 3.5 K, MC to 4.5 K |
| 2018/05/06 | |
| 2018/05/05 | |
| 2018/05/04 | Initial LHe transfer. 250L LHe storage Dewar vacuum failure/boiloff. |
| 2018/05/03 | Polish bottom flange of IVC middle can. Cryoclean mixture. Transfer LN2. LN2 transfer is slow. |
| 2018/05/02 | |
| 2018/05/01 | Blow out LN2. Discover leak from bath to IVC. Begin warmup. |
| 2018/04/30 (Mon) | Cryoclean mixture. Transfer LN2 |
| 2018/04/29 | |
| 2018/04/28 | Pump out cryostat vacuum jacket |
| 2018/04/27 | Remove tower, determine that Side Coax ST-3-9 is causing the short to chassis. Swap out side coax, reassemble and install tower, pump out IVC, cryoclean mixture |
| 2018/04/26 | |
| 2018/04/25 | Discover short to chassis (again) from DIB3 QETA. Blow out LN2. Begin warmup. |
| 2018/04/24 | Cryoclean mixture. Transfer LN2. |
| 2018/04/23 (Mon) | 300 K throughput test. Remove tower, remove DIB3 pin2 wirebond to repair short. Reinstall tower, pump out IVC |
| 2018/04/22 | |
| 2018/04/21 | |
| 2018/04/20 | Discover short to chassis from DIB3 QETA. Blow out LN2. Throughput low, partial blockage. Begin warmup. |
| 2018/04/19 | Redo indium seal at IVC bottom. Transfer LN2. |
| 2018/04/18 | Continue warmup. IVC leak not present at 235 K. Cryoclean mixture. |
| 2018/04/17 | Blow out LN2. Discover leak from bath to IVC. Begin warmup. |
| 2018/04/16 (Mon) | Cryoclean mixture. Transfer LN2. |
| 2018/04/15 | |
| 2018/04/14 | |
| 2018/04/13 | Cryoclean mixture. Finish tower installation. Some bad pin connections on SQUET ZC-74. Pump out IVC. |
| 2018/04/12 | Cryoclean mixture. Install tower. |
| 2018/04/11 | Cryoclean mixture. Assemble tower. |
Run 67
| Run | Det | Det Type | Source | Purpose |
|---|---|---|---|---|
| 67 | USD1 | USD-Ge 100mm 4Q | 4 Am-241 | Re-test charge performance |
| 2018/04/10 | |
| 2018/04/09 (Mon) | Remove tower |
| 2018/04/08 | |
| 2018/04/07 | |
| 2018/04/06 | Modify wirebonding on SQUET ZC-24. Open IVC and begin disassembly |
| 2018/04/05 | |
| 2018/04/04 | |
| 2018/04/03 | Evidence that some mixture was lost. |
| 2018/04/02 (Mon) | Stop circulation, begin warmup. |
| 2018/04/01 | |
| 2018/03/31 | 1K Pot failure. Circulation pressures rise above 1 atm. |
| 2018/03/30 | |
| 2018/03/29 | |
| 2018/03/28 | |
| 2018/03/27 | |
| 2018/03/26 (Mon) | |
| 2018/03/25 | |
| 2018/03/24 | |
| 2018/03/23 | |
| 2018/03/22 | |
| 2018/03/21 | |
| 2018/03/20 | Blow out LN2. First LHe transfer. |
| 2018/03/19 (Mon) | Finish warm-up. Redo lower IVC seal. LN2 transfer. |
| 2018/03/18 | |
| 2018/03/17 | |
| 2018/03/16 | |
| 2018/03/15 | Fridge blockage discovered. Blow out LN2. Discover another big leak into the IVC. |
| 2018/03/14 | Transfer LN2 (with no mixture in fridge), cryoclean mixture. 77K short not present this time. |
| 2018/03/13 | Deinstall tower, change side coax and tower face orientation, reinstall tower, pump IVC, cryoclean mixture |
| 2018/03/12 (Mon) | |
| 2018/03/11 | Let nitrogen into cryostat vacuum jacket to accelerate warmup. |
| 2018/03/10 | |
| 2018/03/09 | More test signal calibration data. Let helium into cryostat vacuum jacket for fast warmup. |
| 2018/03/08 | Take test signal calibration and bias sweep data. |
| 2018/03/07 | More difficulty cooling to 1K, attempt to circulate. Probably leak to IVC is too big. |
| 2018/03/06 | Take 4K data. Difficulty cooling to 1K. |
| 2018/03/05 (Mon) | Blow out LN2. Evidence of leak from main bath to IVC. Initial LHe transfer. |
| 2018/03/04 | Successful 77K throughput test. Short to chassis still present but smaller. Transfer more LN2 (no LHe available) |
| 2018/03/03 | Cryoclean mixture. Transfer LN2. |
| 2018/03/02 | Remove tower. Examine possibilities for 77K short. Swap out the SQUET. More side coax wirebond breaks, fix these. Reinstall tower, pump IVC. |
| 2018/03/01 | Transfer LN2. Discover fridge blockage. Short to chassis in charge wiring appears at 77K. Soften vacuum in cryostat jacket to start warming fridge. |
| 2018/02/28 | Cryoclean mixture, install tower, pump out IVC. |
| 2018/02/27 | Joseph Mammo arrives from USD. Find broken wirebonds on side coaxes, fix these. Assemble tower. Cryoclean mixture. |
| 2018/02/26 (Mon) | Disassemble Run66 tower. USD1 electrical check. |
| 2018/02/22 | Examine USD1 detector, add a double wirebond |
between-run activity
| 2018/02/07 | |
| 2018/02/06 | |
| 2018/01/31 | |
| 2018/01/26 | Reinforce connector ends of new striplines. Begin to reassemble fridge cans. |
| 2018/01/25 | Install Striplines 41,43,48 |
| 2018/01/24 | Prepare Striplines 41,43,48 for installation |
| 2018/01/23 | Remove Striplines 19,20,27 |
| 2018/01/22 (Mon) | Polish end of stripline tube |
| 2018/01/19 | Prepare to remove Striplines 19,20,27 |
Run 66
| Run | Det | Det Type | Source | Purpose |
|---|---|---|---|---|
| 66 | G101c (aka “HV #2”) | SNOLAB HV prototype | none | Test with reduced shunt resistances. n,gamma coincidence NR calibration attempt. |
| 2018/01/18 | Remove tower and put in clean room |
| 2018/01/17 | Begin tower deinstallation |
| 2018/01/16 (Tue) | Finish removing lead/poly shield, lower main bath, open IVC. (10 days to warm up without softening main bath vacuum) |
| 2018/01/12 | |
| 2018/01/11 | |
| 2018/01/10 | |
| 2018/01/09 | |
| 2018/01/08 (Mon) | Return PuBe source to Tate |
| 2018/01/07 | |
| 2018/01/06 | |
| 2018/01/05 | |
| 2018/01/04 | Pump mixture to dump. Continue warmup. |
| 2018/01/03 | IbIs and noise data on two Side 2 channels with shorted shunt resistors. Begin warmup |
| 2018/01/02 | Remove HV box, switch to 2-sided readout |
| 2018/01/01 (Mon) | |
| 2017/12/31 | |
| 2017/12/30 | |
| 2017/12/29 | Tests with floating the phonon grounds. Possibly damaged a SQUID |
| 2017/12/28 | Test triggering from multiple DCRCs |
| 2017/12/27 | Take overnight 70V data with flashing and in-series randoms |
| 2017/12/26 | Take overnight -70V data with flashing |
| 2017/12/25 (Mon) | Take overnight 70V data with flashing |
| 2017/12/24 | Take overnight 70V data with flashing |
| 2017/12/23 | Take overnight 70V data with flashing |
| 2017/12/22 | Take overnight 70V data with flashing |
| 2017/12/21 | |
| 2017/12/20 | Modify triggerfe pileup rejection algorithm, take test data. Tests with partial HV (disconnect some channels from bias). |
| 2017/12/19 | Take noise data |
| 2017/12/18 (Mon) | Warm tower to 53 mK and take test data. Noise data in s/c |
| 2017/12/17 | |
| 2017/12/16 | Test data with half the channels flipped (reverse polarity). Noise data in superconducting state |
| 2017/12/15 | Randoms rate scan with reduced trace lengths. |
| 2017/12/14 | HV scan data. Test data with no pileup rejection. |
| 2017/12/13 | NaI pulse data taken through DCRC. |
| 2017/12/12 | Strong PuBe activation. Randoms-only test. |
| 2017/12/11 (Mon) | Test triggering on different channels. Strong PuBe activation. |
| 2017/12/10 | PuBe weak activation. Randoms rate scan. Test signal frequency scan, triggering on test signal |
| 2017/12/9 | PuBe weak activation. Test triggering on different channels |
| 2017/12/8 | PuBe weak activation |
| 2017/12/7 | PuBe weak activation. Clean Pfeiffer vacuum gauge (gauge on turbo pump) |
| 2017/12/6 | PuBe weak activation |
| 2017/12/5 | Automated IbIs. Get PuBe source from Tate. |
| 2017/12/4 (Mon) | Choose standard QET biases. Humid day, used E-box purge. |
| 2017/12/3 | Noise versus HV data |
| 2017/12/2 | Noise versus HV data |
| 2017/12/1 | Replace power supply in cryo computer (vuk-01), working now. |
| 2017/11/30 | Remote HV control work. Reach 22 mK. |
| 2017/11/29 | Problems with cryo computer (vuk-01). Automated IbIs at 45 V. Reach 23 mK |
| 2017/11/28 | Automated IbIs at 45 V |
| 2017/11/27 (Mon) | Complete 0V IbIs. Automated IbIs at 45 V. Install south shield frame with NaI detectors. |
| 2017/11/26 | MIDAS DAQ programs won't stay on, DCRCs stuck, require powercycle. Automated IbIs |
| 2017/11/25 | Automated IbIs. Reach 24 mK |
| 2017/11/24 | Automated IbIs |
| 2017/11/23 | Automated IbIs. Reach 26 mK |
| 2017/11/22 | Automated IbIs |
| 2017/11/21 | Raise front-end gains. Automated IbIs, remote HV control. |
| 2017/11/20 (Mon) | Automated IbIs. Remote HV control via DCRC. |
| 2017/11/19 | Automated IbIs. Reach 29 mK |
| 2017/11/18 | Automated IbIs. MIDAS freeze-ups during sequences. |
| 2017/11/17 | Tune SQUIDs. HV scan. Automated IbIs. Reach 33 mK |
| 2017/11/16 | Begin cooling to base, 38 mK |
| 2017/11/15 | Initial LHe transfer |
| 2017/11/14 | Cryoclean mixture, transfer LN2 |
| 2017/11/13 (Mon) | Install tower, pump out IVC |
| 2017/11/12 | |
| 2017/11/11 | |
| 2017/11/10 | Wirebond repairs on G101c (HV#2). Assemble tower. |
| 2017/11/09 | Fridge reassembly. Modify SQUET ZC-31 to reduce shunt resistances. |
| 2017/11/08 | Re-attach 600mK rod. Modify SQUET ZC-74 to reduce shunt resistances. |
Run 65
| Run | Det | Det Type | Source | Purpose |
|---|---|---|---|---|
| 65 | S1502 | 6inch Si 5Q device | 4X Am | Test 6” detector quality and modifications to 6“ setup |
| 2017/11/07 | Remove tower. Modify SQUET ZC-68 to reduce shunt resistances. Design circuit to control external HV bias with a DCRC. |
| 2017/11/06 (Mon) | Lower cryostat |
| 2017/11/05 | |
| 2017/11/04 | |
| 2017/11/03 | Test SQUET re-wirebonding |
| 2017/11/02 | Test different flashing modes. Stop circulation, begin warmup |
| 2017/11/01 | Test different flashing modes |
| 2017/10/31 | Test different flashing modes |
| 2017/10/30 (Mon) | Test different flashing modes |
| 2017/10/29 | |
| 2017/10/28 | |
| 2017/10/27 | Test external LEDs. |
| 2017/10/26 | Test external LEDs. Tower = 83 mK |
| 2017/10/25 | |
| 2017/10/24 | |
| 2017/10/23 (Mon) | |
| 2017/10/22 | |
| 2017/10/21 | |
| 2017/10/20 | Tower → 86 mK. |
| 2017/10/19 | Begin recording data. Tower → 0.22 K |
| 2017/10/18 | Begin circulating. Tower falls only to 0.88 K. Test DCRC52(6). |
| 2017/10/17 | Transfer LN2, blow out LN2, initial LHe transfer. Verify no interchannel shorts. Pumped out IVC a little too early, Tower ~ 10 K. |
| 2017/10/16 (Mon) | Seal and pump out IVC |
| 2017/10/13 | Cryoclean mixture. Looks like some mixture was lost during oil change (780→740 mbar). Begin tower installation. |
Run 64
| Run | Det | Det Type | Source | Purpose |
|---|---|---|---|---|
| 64 | S1502 | 6inch Si 5Q device | 4X Am | Test 6” detector quality and modifications to 6“ setup |
| 2017/10/12 | Test new DCRC from Berkeley, DCRC52(6). Fix shorts on S1502. |
| 2017/10/11 | Disassemble tower. Test and pump out 3He pump |
| 2017/10/10 | Change oil in 3He pump. DCRC stuck-output tests |
| 2017/10/09 (Mon) | Begin cryopumping 3He pump for oil change. DCRC stuck-output tests. |
| 2017/10/08 | DCRC stuck-output tests |
| 2017/10/07 | DCRC stuck-output tests |
| 2017/10/06 | DCRC stuck-output tests. Discover some charge trace lengths are bad, lead to output freezing. |
| 2017/10/05 | Deinstall tower, DCRC stuck-output tests |
| 2017/10/04 | DCRC stuck-output tests |
| 2017/10/03 | DCRC stuck-output tests |
| 2017/10/02 (Mon) | Measure mixture pressure in dump |
| 2017/10/01 | Let N2 into cryostat vacuum jacket to accelerate warmup. |
| 2017/09/30 | Pump mixture out of fridge. Let He into cryostat vacuum jacket to accelerate warmup. |
| 2017/09/29 | Stop circulation, begin warmup. |
| 2017/09/28 | |
| 2017/09/27 | |
| 2017/09/26 | |
| 2017/09/25 (Mon) | Confirm all 5 channels active. Try to get 3 dcrcs working. |
| 2017/09/24 | Bake detector overnight with UV LEDs. |
| 2017/09/23 | Tower reaches 65 mK. First charge pulses seen, no ringing. Bake detector for 7 hours with UV LEDs. |
| 2017/09/22 | Cool to base: 69 mK at tower, 52 mK at MC |
| 2017/09/21 | Blow out LN2. Successful throughput @ 92K. Initial LHe transfer. 250L storage Dewar lost its vacuum and boiled off a bunch of LHe. |
| 2017/09/20 | Transfer LN2, with mixture in fridge. Electrical check. |
| 2017/09/19 | Cryoclean mixture |
| 2017/09/18 (Mon) | Discover He-3 pump is very loud. Deciding what to do about it. Successful room-temperature throughput test. |
| 2017/09/15 | Swap SQUETs to solve LED wiring problem. Begin pumping IVC |
| 2017/09/14 | Install tower: discover that electrode LED wiring is incompatible with SQUET. Install warming tube for helium recovery. |
| 2017/09/13 | Finish tower assembly. Begin tower installation. Finish assembling warming tube for helium recovery. |
| 2017/09/12 | Add copper foil shielding to side coaxes and extenders |
| 2017/09/11 (Mon) | Assemble 150mm tower with new side coax extenders |
| 2017/09/08 | Repair wirebond on detector. Assemble detector&electrode stack. Fix some inter-channel shorts. Begin assembling warming tube for helium recovery. |
| 2017/09/07 | Assemble electrode/sources/LEDs. Re-space clamps on detector, breaking one wirebond |
| 2017/09/06 | Adjust collimator for bare Am source |
| 2017/09/05 (Tue) | |
| 2017/09/01 | Finish reassembling fridge. Modify 150mm electrode for 4 Am sources |
| 2017/08/31 | Begin reassembling fridge |
| 2017/08/30 | Disassemble fridge to remove 600mK rod |
| 2017/08/29 | |
| 2017/08/28 (Mon) | Finish wirebonding S1502. Also some surgery |
| 2017/08/18 | Begin wirebonding S1502 |
| 2017/08/17 | Flip S1502 (150mm/6inch/6” 5Q TAMU device) in its housing |
Run 63
| Run | Det | Det Type | Source | Purpose |
|---|---|---|---|---|
| 63 | G132 | SNOLAB Ge iZIP Pathfinder (iZIPv7) | Am, Pb | Verify Tc recipe and characterize Ge iZIP for SNOLAB project |
| 2017/09/08 | More Run 63 post-mortem |
| 2017/09/07 | |
| 2017/09/06 | More Run 63 post-mortem |
| 2017/09/05 (Tue) | More Run 63 post-mortem. Broke some wirebonds on a side coax. |
| 2017/09/01 | |
| 2017/08/31 | |
| 2017/08/30 | Run 63 post-mortem. Disassemble and examine a SQUET (broke some wirebonds) |
| 2017/08/29 | Finish tower deinstallation |
| 2017/08/28 (Mon) | |
| 2017/08/25 | Begin deinstallation |
| 2017/08/24 | |
| 2017/08/23 | |
| 2017/08/22 | Pump out cryostat vacuum jacket |
| 2017/08/21 (Mon) | Remove lead/poly shield |
| 2017/08/18 | |
| 2017/08/17 | Fridge at 237 K, put N2 in cryostat vacuum jacket |
| 2017/08/15 | |
| 2017/08/14 (Mon) | |
| 2017/08/13 | Pump mixture to dump |
| 2017/08/12 | |
| 2017/08/11 | Begin warmup |
| 2017/08/10 | |
| 2017/08/09 | |
| 2017/08/08 | |
| 2017/08/07 (Mon) | Ship G114 to SLAC |
| 2017/08/06 | |
| 2017/08/05 | |
| 2017/08/04 | |
| 2017/08/03 | Inspect S1502 (150mm/6inch/6“ 5Q TAMU device), find DIB pads don't line up |
| 2017/08/02 | |
| 2017/08/01 | |
| 2017/07/31 (Mon) | |
| 2017/07/30 | |
| 2017/07/29 | |
| 2017/07/28 | |
| 2017/07/27 | |
| 2017/07/26 | |
| 2017/07/25 | |
| 2017/07/24 (Mon) | |
| 2017/07/23 | |
| 2017/07/22 | |
| 2017/07/21 | |
| 2017/07/20 | |
| 2017/07/19 | |
| 2017/07/18 | |
| 2017/07/17 (Mon) | |
| 2017/07/16 | |
| 2017/07/15 | |
| 2017/07/14 | |
| 2017/07/13 | |
| 2017/07/12 | Tower = 26 mK. Start IbIs measurements. |
| 2017/07/11 | Tower = 27 mK. Finish all 4 lead shield walls. |
| 2017/07/10 (Mon) | Two phonon channels not working on DCRC4 |
| 2017/07/09 | |
| 2017/07/08 | |
| 2017/07/07 | Build half of lead/poly shield. Event rate 148 → 134 Hz |
| 2017/07/06 | Notice phonon baseline rise when bias applied |
| 2017/07/05 | Measure Tc's |
| 2017/07/04 | |
| 2017/07/03 (Mon) | Cool to base, 29.2 mK. Measure a couple of Tc's |
| 2017/07/02 | |
| 2017/07/01 | |
| 2017/06/30 | Throughput OK. Blow out LN2, initial LHe transfer. |
| 2017/06/29 | Room temperature throughput check. Transfer LN2. |
| 2017/06/28 | Blow out LN2 and begin warming fridge. |
| 2017/06/27 | Transfer LN2. Fridge blockage. |
| 2017/06/26 (Mon) | Pump out IVC, leak check. Raise main bath. |
| 2017/06/23 | Finish tower installation. Reroute broken stripline trace. |
| 2017/06/22 | Find shorts from phonon channels to chassis as seen at SLAC. Begin installing tower. |
| 2017/06/21 | Install Am and Pb internal sources, external LEDs. Assemble tower |
| 2017/06/20 | Repair wirebonds on side coaxes |
| 2017/06/19 (Mon) | Discover broken charge channels on side coaxes |
| 2017/06/16 | Detector G132 arrives from SLAC |
Run 62
| Run | Det | Det Type | Source | Purpose |
|---|---|---|---|---|
| 62 | S101 (aka “HV #4”) | SNOLAB HV prototype | Unshielded Am | First Si HV prototype test for SNOLAB project |
| 2017/06/20 | |
| 2017/06/19 (Mon) | |
| 2017/06/16 | |
| 2017/06/15 | |
| 2017/06/14 | |
| 2017/06/13 | Begin warmup |
| 2017/06/12 (Mon) | |
| 2017/06/11 | |
| 2017/06/10 | |
| 2017/06/09 | |
| 2017/06/08 | |
| 2017/06/07 | |
| 2017/06/06 | |
| 2017/06/05 (Mon) | |
| 2017/06/04 | |
| 2017/06/03 | |
| 2017/06/02 | |
| 2017/06/01 | |
| 2017/05/31 | |
| 2017/05/30 | |
| 2017/05/29 (Mon) | |
| 2017/05/28 | |
| 2017/05/27 | |
| 2017/05/26 | |
| 2017/05/25 | |
| 2017/05/24 | |
| 2017/05/23 | |
| 2017/05/22 (Mon) | |
| 2017/05/21 | |
| 2017/05/20 | |
| 2017/05/19 | |
| 2017/05/18 | |
| 2017/05/17 | |
| 2017/05/16 | |
| 2017/05/15 (Mon) | |
| 2017/05/14 | |
| 2017/05/13 | |
| 2017/05/12 | |
| 2017/05/11 | |
| 2017/05/10 | |
| 2017/05/09 | |
| 2017/05/08 (Mon) | |
| 2017/05/07 | |
| 2017/05/06 | |
| 2017/05/05 | |
| 2017/05/04 | |
| 2017/05/03 | |
| 2017/05/02 | |
| 2017/05/01 (Mon) | |
| 2017/04/30 | |
| 2017/04/29 | |
| 2017/04/28 | |
| 2017/04/27 | |
| 2017/04/26 | |
| 2017/04/25 | |
| 2017/04/24 (Mon) | |
| 2017/04/23 | |
| 2017/04/22 | |
| 2017/04/21 | |
| 2017/04/20 | |
| 2017/04/19 | Install NaI detectors on South lead/poly shield wall |
| 2017/04/18 | |
| 2017/04/17 (Mon) | |
| 2017/04/16 | |
| 2017/04/15 | |
| 2017/04/14 | |
| 2017/04/13 | |
| 2017/04/12 | |
| 2017/04/11 | |
| 2017/04/10 (Mon) | |
| 2017/04/09 | |
| 2017/04/08 | |
| 2017/04/07 | |
| 2017/04/06 | |
| 2017/04/05 | |
| 2017/04/04 | |
| 2017/04/03 (Mon) | |
| 2017/04/02 | |
| 2017/04/01 | |
| 2017/03/31 | |
| 2017/03/30 | |
| 2017/03/29 | |
| 2017/03/28 | |
| 2017/03/27 (Mon) | |
| 2017/03/26 | |
| 2017/03/25 | |
| 2017/03/24 | |
| 2017/03/23 | |
| 2017/03/22 | |
| 2017/03/21 | |
| 2017/03/20 (Mon) | |
| 2017/03/19 | |
| 2017/03/18 | |
| 2017/03/17 | |
| 2017/03/16 | |
| 2017/03/15 | |
| 2017/03/14 | |
| 2017/03/13 (Mon) | |
| 2017/03/12 | |
| 2017/03/11 | |
| 2017/03/10 | |
| 2017/03/09 | |
| 2017/03/08 | |
| 2017/03/07 | |
| 2017/03/06 (Mon) | Build lead shield |
| 2017/03/05 | |
| 2017/03/04 | |
| 2017/03/03 | |
| 2017/03/02 | |
| 2017/03/01 | |
| 2017/02/28 | |
| 2017/02/27 (Mon) | |
| 2017/02/26 | |
| 2017/02/25 | |
| 2017/02/24 | |
| 2017/02/23 | |
| 2017/02/22 | Switch to HV mode |
| 2017/02/21 | |
| 2017/02/20 (Mon) | |
| 2017/02/19 | |
| 2017/02/18 | |
| 2017/02/17 | |
| 2017/02/16 | |
| 2017/02/15 | |
| 2017/02/14 | |
| 2017/02/13 (Mon) | IbIs work |
| 2017/02/12 | |
| 2017/02/11 | |
| 2017/02/10 | |
| 2017/02/09 | Assess non-functioning channels |
| 2017/02/08 | |
| 2017/02/07 | |
| 2017/02/06 (Mon) | |
| 2017/02/05 | |
| 2017/02/04 | |
| 2017/02/03 | |
| 2017/02/02 | Tune DIB1 SQUIDs |
| 2017/02/01 | Measure Tc's on working DIB3 channels using DC method. Tower reaches 40 mK (DCRCs powered) |
| 2017/01/31 | Investigate heating problem with DIB1 LEDs. |
| 2017/01/30 (Mon) | Measure Tc's on working DIB4 channels using DC method. Tower reaches 41 mK (DCRCs powered) |
| 2017/01/29 | Tower reaches 45 mK (DCRCs powered) |
| 2017/01/28 | Tower reaches 47 mK (DCRCs powered) |
| 2017/01/27 | Problems with DCRC3. Tower reaches 49 mK (DCRCs powered) |
| 2017/01/26 | Measure DIB1 Tc's using DC method. Find that some channels seem to be broken. Tower reaches 61 mK (DCRCs powered) |
| 2017/01/25 | First pulses seen. Attempt Tc measurement but test signal seems to drive TESs normal. Tower reaches 65 mK (DCRCs powered) |
| 2017/01/24 | Cool to base. MC reaches 34 mK, Tower reaches 67 mK. Tower cools slowly in this run… |
| 2017/01/23 (Mon) | LN2 transfer. This time good throughput. LHe transfer. |
| 2017/01/22 | |
| 2017/01/21 | Room-temperature throughput test. Cryoclean mixture. |
| 2017/01/20 | Warm fridge again. Notice high levels of contamination after cryocleaning. Cryoclean mix again. |
| 2017/01/19 | Warm fridge to near room temp, LN2 transfer, another blockage seen. |
| 2017/01/18 | Blow out LN2, discover blockage (failed throughput test). Start warming fridge. |
| 2017/01/17 (Tue) | Transfer LN2 |
| 2017/01/16 | |
| 2017/01/15 | |
| 2017/01/14 | |
| 2017/01/13 | |
| 2017/01/12 | |
| 2017/01/11 | Raise main bath |
| 2017/01/10 | Small leak at top of stripline tube |
| 2017/01/09 (Mon) | Finish installing tower, begin pumping IVC |
| 2017/01/08 | |
| 2017/01/07 | |
| 2017/01/06 | Begin tower installation |
| 2017/01/05 | Repair broken wirebond, assemble tower |
| 2017/01/04 | Assemble external LED holder, drill LED window hole in source holder plate. Wirebond break during stack assembly. |
| 2017/01/03 (Tue) | |
| 2016/12/30 | Finish drilling second holes in four fridge bath ports to further dampen Taconis oscillations. Build source holder adapter for unshielded 241Am source. |
| 2016/12/29 | Repair broken wirebond |
| 2016/12/28 (Wed) | Re-wirebond S101. Receive unshielded 241Am source from UCB. |
| 2016/12/21 | |
| 2016/12/20 | S101 initial electrical check |
| 2016/12/19 (Mon) | Detector S101 arrives at UMN |
Run 61
| Run | Det | Det Type | Source | Purpose |
|---|---|---|---|---|
| 61 | G101c (aka “HV #2”) | SNOLAB HV prototype | none | First HV prototype test for SNOLAB project |
| 2016/12/21 | |
| 2016/12/20 | Remove tower |
| 2016/12/19 (Mon) | Lower main bath, open IVC, begin tower removal |
| 2016/12/18 | |
| 2016/12/17 | |
| 2016/12/16 | Begin warmup |
| 2016/12/15 | |
| 2016/12/14 | |
| 2016/12/13 | |
| 2016/12/12 (Mon) | Take 90V pulse data |
| 2016/12/11 | |
| 2016/12/10 | Noise data versus HV with varied pre-biasing schemes. Take 75V pulse data |
| 2016/12/09 | Noise data versus HV with varied pre-biasing schemes. Take 60V pulse data |
| 2016/12/08 | Elevate tower to 67 mK and study IbIs & 10kHz oscillations. Take 45V pulse data |
| 2016/12/07 | Take 15V pulse data |
| 2016/12/06 | Take 30V pulse data |
| 2016/12/05 (Mon) | Switch to 1-sided HV mode, full IbIs at 0V |
| 2016/12/04 | 22Na data with external NaI trigger for Compton study |
| 2016/12/03 | 22Na data for Compton study |
| 2016/12/02 | IbIs stability studies. Take 2-sided data with modified (higher) QET bias settings. |
| 2016/12/01 | IbIs stability studies. Take 2-sided data. |
| 2016/11/30 | Full IbIs measurements. |
| 2016/11/29 | Full IbIs. Take 2-sided 0V data |
| 2016/11/28 (Mon) | Mini-IbIs stability |
| 2016/11/27 | |
| 2016/11/26 | |
| 2016/11/25 | |
| 2016/11/24 | |
| 2016/11/23 | |
| 2016/11/22 | PuBe neutron activation, 3 hours. |
| 2016/11/21 (Mon) | |
| 2016/11/20 | |
| 2016/11/19 | |
| 2016/11/18 | |
| 2016/11/17 | |
| 2016/11/16 | Mini-IbIs and dIb/dIs for Rn, Rp, Rtes, compare&contrast |
| 2016/11/15 | Mini-IbIs for Rn, Rp, Rtes |
| 2016/11/14 (Mon) | Coincidence data with 88Y and external NaI source as trigger |
| 2016/11/13 | |
| 2016/11/12 | Coincidence data with 88Y and external NaI source as trigger |
| 2016/11/11 | Coincidence data with 88Y and external NaI source as trigger |
| 2016/11/10 | DCRC hiccup, readjust QET biases, take pulse data (good dataset) |
| 2016/11/09 | Switch back to 2-sided setup, take pulse data |
| 2016/11/08 | PuBe neutron activation, 4 hours. Long-trace data to study muon pulses |
| 2016/11/07 (Mon) | Noise data versus HV bias with pre-biasing (aka overshooting) |
| 2016/11/06 | Noise data versus HV bias, -HV. Cf activation |
| 2016/11/05 | Noise data versus HV bias, +HV |
| 2016/11/04 | Sampling glitch seen, then it goes away again |
| 2016/11/03 | Erect lead-poly shield, reduces background rate 80→20 Hz. dIb/dIs data, noise data, pulse data |
| 2016/11/02 | Bill Page arrives. Rparasitic, Rnormal. Superconducting and normal-state noise. |
| 2016/11/01 | QET biases suddenly too low, need to be increased |
| 2016/10/31 (Mon) | Mini-IbIs, parasitic resistance |
| 2016/10/30 | Cf activation |
| 2016/10/29 | Cf activation |
| 2016/10/28 | Test HV to +70V HV, +50V on detector. Cf activation. |
| 2016/10/27 | Mini-IbIs |
| 2016/10/26 | Test HV bias to ±30 V |
| 2016/10/25 | Set up 1-sided HV-mode (Side 1 readout). Take noise and pulse data |
| 2016/10/24 (Mon) | Take 2-sided data. Cf activation. |
| 2016/10/23 | Activate detector with Cf source |
| 2016/10/22 | 1K Pot failure, recover 1K Pot and cool back to base. Take zero-bias data |
| 2016/10/21 | Measure Rnormal and Rbiased |
| 2016/10/20 | Select new QET biases lower in transition. Take zero-bias data |
| 2016/10/19 | Tune SQUIDs, set high-ish QET biases. Take zero-bias data |
| 2016/10/18 | dIb-dIs measurements, mini-IbIs measurements. Oscillations in phonon traces at certain QET bias settings |
| 2016/10/17 (Mon) | First pulses. Measure Tc's |
| 2016/10/16 | Bake detector |
| 2016/10/15 | Bake detector |
| 2016/10/14 | Cool to base, 38 mK |
| 2016/10/13 | Blow out LN2, throughput test, initial LHe transfer |
| 2016/10/12 | Seal and leak check IVC, drill holes in fridge port tubes to fix Taconis problem, transfer LN2 |
| 2016/10/11 | Reroute two broken wires on Stripline 19, finish tower installation |
| 2016/10/10 (Mon) | Build tower, begin installation |
| 2016/10/09 | |
| 2016/10/08 | |
| 2016/10/07 | Final G101c wirebond repair |
| 2016/10/06 | Re-wirebond G101c, build LEDs into source holder |
| 2016/10/05 | Deinstall tower and cans. Begin G101c wirebond repairs. |
| 2016/10/04 | Plan LED installation for G101c, whose housing lacks LEDs. |
| 2016/10/03 (Mon) | Lower Dewar. Receive G101c, which has some problems. |
Run 60
| Run | Det | Det Type | Source | Purpose |
|---|---|---|---|---|
| 60 | 150 mm Si Contact-Free | 1 x Am-241 |
| 2016/10/02 | |
| 2016/10/01 | |
| 2016/09/30 | |
| 2016/09/29 | |
| 2016/09/28 | |
| 2016/09/27 | |
| 2016/09/26 (Mon) | |
| 2016/09/25 | |
| 2016/09/24 | |
| 2016/09/23 | |
| 2016/09/22 | |
| 2016/09/21 | |
| 2016/09/20 | |
| 2016/09/19 (Mon) | |
| 2016/09/18 | |
| 2016/09/17 | |
| 2016/09/16 | |
| 2016/09/15 | Blow out LN2, successful throughput test, initial LHe transfer |
| 2016/09/14 | Cryoclean mixture, transfer LN2, verify no dilution-to-IVC leak |
| 2016/09/13 | Install tower, seal IVC |
| 2016/09/12 (Mon) | Install tower, repair tower thermometer wire |
| 2016/09/11 | |
| 2016/09/10 | |
| 2016/09/09 | Seal IVC and check for IVC-to-dilution unit leak, none seen |
| 2016/09/08 | Open MC and replace MC indium seal |
| 2016/09/07 | Remove entire IVC, attempted leak checks |
| 2016/09/06 | Room-temperature leak checks from IVC to dilution unit |
| 2016/09/05 (Mon) | |
| 2016/09/04 | |
| 2016/09/03 | |
| 2016/09/02 | Leak from dilution unit to IVC discovered at 77K. Begin warmup to fix leak. |
| 2016/09/01 | Discover SQUET wiring inconsistencies, seal and pump on IVC |
| 2016/08/31 (Wed) | Tower Electrical check, install tower. |