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Runs 48-59

Run 59

Run Det Det Type Source Purpose
59 G106a 100 mm IZIP v6 2 x Am-241
2016/08/30 Uninstall tower, take out 600 mK rod.
2016/08/29 (Mon) Lower dewar.
2016/08/28 HV testing, stop circulation
2016/08/27 HV testing
2016/08/26
2016/08/25
2016/08/24
2016/08/23
2016/08/22 (Mon)
2016/08/21
2016/08/20
2016/08/19
2016/08/18
2016/08/17
2016/08/16
2016/08/15 (Mon)
2016/08/14
2016/08/13
2016/08/12
2016/08/11
2016/08/10
2016/08/09
2016/08/08 (Mon)
2016/08/07
2016/08/06
2016/08/05
2016/08/04 package Soudan iT4 detector stack
2016/08/03
2016/08/02
2016/08/01 (Mon)
2016/07/31
2016/07/30
2016/07/29
2016/07/28
2016/07/27
2016/07/26
2016/07/25 (Mon) Pumpout of LN cold trap Dewar jacket
2016/07/24
2016/07/23
2016/07/22 Repairs to LN cold trap Dewar
2016/07/21 1K Pot failure then recooling. Mu-metal shield studies
2016/07/20 Mu-metal shield studies. Power interruption stops pumps temporarily.
2016/07/19 Mu-metal shield studies
2016/07/18 (Mon) Mu-metal shield studies
2016/07/17
2016/07/16
2016/07/15 Reach base, Tower = 38 mK. Mu-metal shield studies. HPGe tests.
2016/07/14 Slow cooldown to base, Tower reaches 161 mK
2016/07/13 Start circulation. Tower reaches 610 mK
2016/07/12 Initial LHe transfer
2016/07/11 (Mon) Transfer LN2
2016/07/10
2016/07/09
2016/07/08
2016/07/07 Discover another blockage, begin warming
2016/07/06 Transfer LN2
2016/07/05
2016/07/04 (Mon)
2016/07/03
2016/07/02 Blow out LN2, perform throughput test, discover blockage
2016/07/01 Cryoclean mixture, transfer LN2
2016/06/30 Swap out bad SQUET, finish install, pump IVC
2016/06/29 More stripline breaks/rerouting
2016/06/28 Tower installation, stripline breaks/rerouting. Using all three rerouting boards
2016/06/27 (Mon) Assemble tower with short sCDMS side coaxes and spool
2016/06/24
2016/06/23
2016/06/22 Assemble tower, discover broken side coax
2016/06/21 Reinforce SQUET flyover insulation, assemble source holder

Run 58

Run Det Det Type Source Purpose
58 USD1 4-Q 4 x Am-241 Charge breakdown, charge collection efficiency
2016/06/20 (Mon)
2016/06/17
2016/06/16 Discover recovery system check valve is installed wrong. Let He gas into MB vacuum jacket for faster warmup.
2016/06/15 Warming. Electrical checkout at 20 K
2016/06/14 HV breakdown tests. Symmetric biasing breakdown tests. Also test data run with 1 DCRC and one charge channel, to simulate 6“ data.
2016/06/13 (Mon) Restart circulation after a power failure. Correct HV-board grounding for 1-DCRC setup. Disconnect DIB1pD feedback to avoid chassis short. HV breakdown tests.
2016/06/12 Take Ba bias-sweep data
2016/06/11 Take Ba bias-sweep data
2016/06/10 1K Pot behavior stabilizes. Troubleshoot HV board.
2016/06/09
2016/06/08 1K Pot failure overnight. Restore base temperature. Take bias-sweep data.
2016/06/07 DAQ crashes. Problems keeping 1K Pot stable.
2016/06/06 (Mon) Tower reaches 45 mK. Cooling power test. Edit MIDAS Flash and Flash sequence file to reverse LED current polarity. Take 2-hour series.
2016/06/05 Tower reaches 180 mK
2016/06/04 Tower reaches 0.3 K
2016/06/03 Start circulation, slow progress: Tower reached 0.6 K
2016/06/02 Attempt circulation but MC too warm, apparently
2016/06/01 Initial LHe transfer. Pump out exchange gas too early, at MC = 19K
2016/05/31 Successful throughput test. Transfer LN2
2016/05/30 (Mon)
2016/05/29
2016/05/28 Attempting throughput test with dirty mix produces blockage. Let fridge warm up.
2016/05/27 LN2 transfer
2016/05/26 Install tower
2016/05/25 Discover broken wirebonds, repair wirebonds, construct tower
2016/05/24 Assess side coax stock
2016/05/23 (Mon)

Run 57

Run Det Det Type Source Purpose
57 G114 100 mm IZIP v6 none Test in HV mode and iZIP mode
2016/05/20 Tower electrical checkout
2016/05/19 Locate chassis short at SQUET
2016/05/18 SD Crystal USD1 Electrical Checkout.
2016/05/17 Measure magnetic field versus height in mu-metal shield
2016/05/16 (Mon)
2016/05/15
2016/05/14
2016/05/13
2016/05/12
2016/05/11
2016/05/10
2016/05/09 (Mon)
2016/05/08
2016/05/07
2016/05/06 Troubleshoot HV leakage. Modified DIB3 warm end diverter board.
2016/05/05
2016/05/04 Suddenly HV has high leakage, can't bias detector very high.
2016/05/03 HV tests. Low leakage, pulses present up to 30 V. USD1 wirebonding.
2016/05/02 (Mon) HV tests. Low leakage, pulses present up to 20 V. USD1 wirebonding.
2016/05/01
2016/04/30
2016/04/29
2016/04/28
2016/04/27 Tune SQUIDs. Tc Measurements. USD1 mounting.
2016/04/26
2016/04/25 (Mon) Start circulation
2016/04/24
2016/04/23
2016/04/22
2016/04/21
2016/04/20
2016/04/19 Fridge warming, blockage still present. Measure magnetic field with/without mu-metal shield with SLAC magnetometer.
2016/04/18 (Mon) Electrical checkout, discover channel map error. Blow out LN. Throughput test: discover fridge blockage. Problem with LN trap Dewar.
2016/04/17 Transfer LN
2016/04/16
2016/04/15 Transfer LN
2016/04/14 Pump out IVC, raise main bath, clean mixture
2016/04/13 Reroute another broken stripline trace. Install tower with new SQUET from Soudan
2016/04/12
2016/04/11 (Mon) IT4 disassembly/inspection
2016/04/10
2016/04/09
2016/04/08 Reroute broken stripline trace. One SQUET dies (open SQUID)
2016/04/07 Install tower. One stripline break. Begin IT4 disassembly.
2016/04/06 Assemble tower. Unpack IT4.
2016/04/05 Retrieve IT4 from Soudan decommissioning
2016/04/04 (Mon) Epoxy loose socket on Face 3 of tower
2016/04/03
2016/04/02
2016/04/01 Fix short on Face 3 of tower
2016/03/31 Repair wirebond connections on G114. Assess status of other tower faces.
2016/03/30 Repair DIB pad on G114
2016/03/29 Socket on Face 6 of Tower breaks off. Attempt wirebond repair of G114
2016/03/28 (Mon) SLAC Magnetometer test
2016/03/27
2016/03/26
2016/03/25 Room-temperature HV leakage checks on HV board, cables, striplines
2016/03/24 Construct tower, electrical checkout. Stripline resistance measurement.
2016/03/23 Detector electrical checkout

Run 56

Run Det Det Type Source Purpose
56 G106A 100 mm IZIP v6 1 x Pb-210 iZIPv6 full characterization
2016/03/23 Detector electrical checkout
2016/03/22 Remove tower
2016/03/21 (Monday)
2016/03/20
2016/03/19
2016/03/18
2016/03/17
2016/03/16 Begin warmup. Demount G101b, examine USD1 (South Dakota crystal)
2016/03/15
2016/03/14 (Monday)
2016/03/13
2016/03/12
2016/03/11
2016/03/10 Data after cooldown without mu-metal shield. Test inverting half the pulses.
2016/03/09 Heat and recool with mu-metal shield removed. Measure magnetic field in lab.
2016/03/08 Lower mu-metal shield, do mini-IbIs, measure Tc's
2016/03/07 (Monday) Measure Tc's
2016/03/06
2016/03/05
2016/03/04
2016/03/03
2016/03/02
2016/03/01
2016/02/29 (Monday)
2016/02/28
2016/02/27
2016/02/26
2016/02/25
2016/02/24
2016/02/23
2016/02/22 (Monday)
2016/02/21
2016/02/20
2016/02/19
2016/02/18
2016/02/17
2016/02/16
2016/02/15 (Monday)
2016/02/14
2016/02/13
2016/02/12
2016/02/11
2016/02/10
2016/02/09
2016/02/08 (Monday) Start testing switchable pi-filter board
2016/02/07
2016/02/06
2016/02/05
2016/02/04
2016/02/03
2016/02/02
2016/02/01 (Monday)
2016/01/31
2016/01/30
2016/01/29
2016/01/28
2016/01/27
2016/01/26
2016/01/25 (Monday)
2016/01/24
2016/01/23
2016/01/22 Set up shield for photoneutron data
2016/01/21
2016/01/20
2016/01/19
2016/01/18 (Monday)
2016/01/17
2016/01/16
2016/01/15
2016/01/14 Measure event rate from strong Y-88 source
2016/01/13
2016/01/12 Y data
2016/01/11 (Monday) Y data
2016/01/10 Y data
2016/01/09 Y data
2016/01/08 Y data
2016/01/07 Y data
2016/01/06 Y data
2016/01/05 Cf data
2016/01/04 (Monday) Cf data
2016/01/03
2016/01/02
2016/01/01
2015/12/31 DAQ tests
2015/12/30 Start circulation, cool to base
2015/12/29 LN2 blowout, LHe transfer, cool to 4K
2015/12/28 (Monday) LN2 transfer, cool to 77 K

Run 55

Run Det Det Type Source Purpose
55 G106A 100 mm IZIP v6 1 x Pb-210 iZIPv6 full characterization
2015/12/21
2015/12/18
2015/12/17
2015/12/16
2015/12/15
2015/12/14 (Monday)
2015/12/13
2015/12/12
2015/12/11
2015/12/10
2015/12/09
2015/12/08
2015/12/07 (Monday)
2015/12/06
2015/12/05
2015/12/04
2015/12/03 Install lead/poly shield
2015/12/02 Start circulation
2015/12/01 Initial LHe transfer
2015/11/30 (Monday)
2015/11/25 Cryoclean mixture, leak check IVC, set up Cf source to activate detector
2015/11/24 Pump out IVC, cryoclean mixture
2015/11/23 (Monday) Install tower
2015/11/20 Tower checkout and disassembly/reassembly

Run 54

Run Det Det Type Source Purpose
54 G106A 100 mm IZIP v6 1 x Am-241, 1 x Pb-210 (incorrectly installed) test HV-operation for 100mm crystal, test DCRC filters, iZIPv6 full characterization
2015/11/20 Tower checkout and disassembly/reassembly
2015/11/19 Remove tower
2015/11/18 Drop Dewar, pump out vacuum jacket
2015/11/17 Recover mixture, remove shield
2015/11/16 (Monday)
2015/11/15
2015/11/14
2015/11/13
2015/11/12 HV-mode temperature test. Test MIDAS for setting up DCRCs.
2015/11/11 HV-mode temperature test
2015/11/10
2015/11/09 (Monday)
2015/11/08
2015/11/07
2015/11/06
2015/11/05
2015/11/04
2015/11/03
2015/11/02 (Monday)
2015/11/01
2015/10/31
2015/10/30
2015/10/29
2015/10/28
2015/10/27
2015/10/26 (Monday)
2015/10/25
2015/10/24
2015/10/23
2015/10/22
2015/10/21
2015/10/20
2015/10/19 (Monday)
2015/10/18
2015/10/17
2015/10/16
2015/10/15
2015/10/14
2015/10/13
2015/10/12 (Monday)
2015/10/11
2015/10/10
2015/10/09
2015/10/08
2015/10/07
2015/10/06
2015/10/05 (Monday)
2015/10/04
2015/10/03
2015/10/02
2015/10/01
2015/09/30
2015/09/29
2015/09/28 (Monday)
2015/09/27
2015/09/26
2015/09/25 “mini-IbIs” for no-filter setup. Charge breakdown study (iZIP mode)
2015/09/24 Take noise data with 1)normal setup 2)DCRCs stacked 3)filters removed. Long-trace.
2015/09/23
2015/09/22
2015/09/21 (Monday)
2015/09/20
2015/09/19
2015/09/18
2015/09/17
2015/09/16
2015/09/15
2015/09/14 (Monday)
2015/09/13
2015/09/12
2015/09/11
2015/09/10
2015/09/09 Take front-end-gain scan data
2015/09/08 Take some HV-mode data
2015/09/07 (Monday)
2015/09/06
2015/09/05
2015/09/04 Take some HV-mode data
2015/09/03 HV vs. leakage tests with some cables unplugged
2015/09/02
2015/09/01 Take bkg data, 4V and 2V bias, front-end gain=1
2015/08/31 (Monday)
2015/08/30
2015/08/29
2015/08/28 3 filtered DIB iZIP testing
2015/08/27 3 filtered DIB iZIP testing
2015/08/26 3 filtered DIB iZIP testing
2015/08/25 3 filtered DIB iZIP testing
2015/08/24 (Monday) High voltage board testing
2015/08/23
2015/08/22
2015/08/21 High voltage board testing
2015/08/20 High voltage board testing
2015/08/19 High voltage board testing
2015/08/18 High voltage board testing
2015/08/17 (Monday) High voltage board testing
2015/08/16
2015/08/15 LHe transfer.
2015/08/14
2015/08/13 LHe transfer, setup high voltage board
2015/08/12 Condense and circulate mixture. Reach base temp.
2015/08/11 Blow out LN, initial LHe transfer
2015/08/10 (Mon) Transfer LN. Cryoclean mixture.
2015/08/09
2015/08/08
2015/08/07
2015/08/06
2015/08/05
2015/08/04
2015/08/03 (Mon)

Run 53

Run Det Det Type Source Purpose
53 G106A 100 mm IZIP v6 1 x Am-241, 1 x Pb-210 nominally iZIPv6 full characterization, actually investigating DAQ performance, e.g. pulse shape quality
2015/07/27 Electrical checkout at around 120 K
2015/07/24 Pulse shape comparisons with different DCRC/DIB/filter combinations. Begin warmup
2015/07/23 Pulse shape comparisons with different DCRC/DIB/filter combinations
2015/07/22 Activate detector with strong neutron source for 30 minutes
2015/07/21 Try ungrounding PoE units that DCRCs plug into
2015/07/20 (Mon) Activate detector with strong neutron source for 2 minutes
2015/07/19
2015/07/18
2015/07/17 Take IbIs with 100MHz c filter in place (c/w no filter and 3.2MHz filter)
2015/07/16 Take background data
2015/07/15 Take some Cf data
2015/07/14 Take some background data, keep an eye on low-f noise and pulse-shape quality
2015/07/13 (Mon) Study effect on pulse shapes of filters and of unpowering phonon channels on the same DIB
2015/07/12 Studying timing link-related noise
2015/07/11
2015/07/10 Ugly pulse study, with different filters and DCRCs, and cross-DCRC contamination
2015/07/09 Pulse shape assessments with filters, with less than three DCRCs powered
2015/07/08 Noise tests with filters in biased, s/c, and normal states.
2015/07/07 Voltage scan, data from -/+ 4 V down to -/+ 0 V
2015/07/06 (Mon) Switch from scroll pump to Trivac for 1K Pot.
2015/07/05
2015/07/04
2015/07/03 Difficulty getting DCRCs into good state
2015/07/02 Take randoms data in biased, s/c, and normal states. Struggle with sluggish DAQ
2015/07/01 Take IbIs with 3.2MHz pi filter in place
2015/06/30 Take some data with filters, some Ba data
2015/06/29 (Mon) Take Bg data after various flashing times, install filters on some DCRCs
2015/06/28
2015/06/27
2015/06/26 Fix transfer tube vacuum leak, test flashing/neutralization
2015/06/25 Take Ba data, test DAQDAQ: still does not work stably
2015/06/24 Take Bg data, optimize thresholds, take Ba data, install DCRC55 (RevC.1) on DIB1
2015/06/23 Take some Ba data, investigate problem with slow data/high CPU usage, take a lot of Bg data
2015/06/22 (Mon) Establish manual data-taking mode, constructed shield
2015/06/21 check Cf activation, try a voltage and/or threshold scan
2015/06/20 take more Bg data for the purpose of getting the trigger and gains set reasonably
2015/06/19 got some “Bg” data (actually Am and Pb too) to get DAQ procedure down and get PSDs
2015/06/18 struggle to keep DAQ in good state
2015/06/17 2nd attempt taking data at various SQUID lockpoints
2015/06/16
2015/06/15 (Mon) Attempt taking data at various SQUID lockpoints
2015/06/14 fill LN trap Dewar
2015/06/13 LHe transfer, fill LN trap Dewar
2015/06/12 Attempt taking data at various gain settings
2015/06/11 Compare 3 DCRCs on DIB3, pulse saturation issue for DCRCX
2015/06/10 Study pulse saturation issue vs gain for DCRC50, try shielding/grounding DCRC50, measure Tc for DIB2, one-shot test
2015/06/09 Study pulse noise with RevC.1 vs RevC. Leak in LHe tranfer tube.
2015/06/08 (Mon) Cooling power test. Set SQUIDs. Flash detector.
2015/06/07 Fill LN trap Dewar.
2015/06/06 LHe transfer. Fill LN trap Dewar.
2015/06/05 Cool to base: 26 mK at MC
2015/06/04 Remove LN, throughput test, initial LHe transfer
2015/06/03 Leak check. Transfer LN.
2015/06/02 Install tower. Reroute broken wire on Stripline 19
2015/06/01 (Mon) Assemble tower
2015/05/29 Rearrange stripline buckle/lower heatsink

Run 52

Run Det Det Type Source Purpose
52 G110 100 mm IZIP v6 1 x Am-241, 1 x Pb-210 First check for charge breakdown, then further standard measurements. Also check cryo performance with full tower.
2015/05/27 Open IVC, uninstall tower.
2015/05/26 (Tue) Drop Dewar
2015/05/22 Difficulty setting up data-taking. Recover mixture and begin warmup.
2015/05/21 Try biased 3-DCRC running mode with DIB1 FETs turned off.
2015/05/20 One-shot test. Search for stable biased running configuration. Discover that DCRC31 Front-End Gains are probably not working.
2015/05/19 Charge breakdown studies
2015/05/18 (Mon) Get cold again, fix DCRC31 communication problem, remeasure Tc's on DIB2
2015/05/17 Transfer LHe (a little late)
2015/05/16 Filled cold trap.
2015/05/15 Noise PSDs on DIB1 with DCRC50. Tried to find combination of DCRCs to avoid interference problem.
2015/05/14 IbIs measurements on DIB1 and DIB3 with DCRC50. Optimal QET biases (and Icrit). Noise PSDs for DIB2 and DIB3 with DCRC50.
2015/05/13 IbIs measurements on DIB2 with DCRC 50. Midas tests. LHe transfer.
2015/05/12 IbIs measurements on all 3 DIBs. Two-side charge breakdown study.
2015/05/11 (Mon) Reestablish base temp. Tc measurements on DIB1 and DIB3.
2015/05/10 Transfer LHe (a little late)
2015/05/08 Flash detector. Cooling power test. Tc measurements on DIB2. Single-side charge breakdown study.
2015/05/07 Lock SQUIDs for DIB2 and DIB3. Connection problems with DCRC31.
2015/05/06 4K electrical checks, begin circulation. 53 mK base at MC, tower 20 mK warmer.
2015/05/05 Fridge slowly cooling to 4K.
2015/05/04 (Mon) Initial LHe transfer. Pumped out exchange gas too early.
2015/05/01 Blow out LN. 80K throughput and resistance checks. Put LN back in for weekend.
2015/04/30 Seal up bottom IVC. Leak check. LN2 transfer. Unpack G106a.
2015/04/29 Finish tower installation. Perform electrical check.
2015/04/28 Electrical check on currently installed striplines and recently arrived striplines.
2015/04/27 (Mon) Install tower. Broken trace found in Stripline 19.
2015/04/24 More tower preparation
2015/04/23 Fix MC spool, build tower
2015/04/22 G110 electrical check, install upper IVC, MC spool, cans
2015/04/21 Install 600 mK rod

Run 51

Run Det Det Type Source Purpose
51 NA NA NA Maintenance Run, with striplines 19, 20, 27, no tower. Check new base temperature with striplines present.
2015/04/20 Drop dewar, open IVC
2015/04/17 Cool to base. 28 mK achieved
2015/04/16 LN blowout, leak check, cryocleaning, LHe transfer.
2015/04/15 Fix some leaks, transfer LN
2015/04/14 Install old striplines in fridge. Pump out IVC.
2015/04/13 New striplines arrive from Berkeley. Unfortunately they have broken striplines.
2015/04/10 New o-rings for stripline tube
2015/04/09 Check newly polished stripline tube (“wizard staff”)
2015/04/08 Clean external pressure sensor cold-cathode elements. Check stripline wiring
2015/04/07 Attach tower thermometer to still plate. Check stripline wiring.

Run 50

Run Det Det Type Source Purpose
50 NA NA NA Maintenance Run, no tower or striplines. Get down to base temperature after removing oil from fridge.
2015/04/06 (Mon) fridge is warm. Disassemble IVC and stripline tube.
2015/04/03 Cooling power tests
2015/04/02 Cool to base: 23 mK base achieved!
2015/04/01 Cool to 4K
2015/03/31 Leak checks, throughput test, LN transfer
2015/03/30 (Mon) Drop Dewar, install full 100 mK can and block stripline tube, reseal IVC
2015/03/28 Leak check IVC at 42 K
2015/03/27 Circulation tests
2015/03/26 Add even more mixture
2015/03/25 Add even more mixture. G2 pressure correction based on barometric pressure.
2015/03/24 Try circulating with more mixture
2015/03/23 (Mon) 1-shots with different amounts of mixture. Add new 4He to mixture.
2015/03/21 LHe transfer.
2015/03/20 Clean mixture. 17K throughput test. One-shot.
2015/03/17 Leak check, start 1 K pot, throughput test, condense and circulate.
2015/03/16 (Mon) Leak check, helium transfer, add mixture to capsule for analysis.
2015/03/14 Leak check, Helium transfer.
2015/03/13 Leak check, helium transfer.
2015/03/12 Turn on sorb.
2015/03/10 (Tue) Leak check, helium transfer, start 1 K pot.
2015/03/08 Leak check.
2015/03/07 Helium transfer.
2015/03/06 Single-shot test, clean cold traps.
2015/03/05 Assess if Still is overflowing.
2015/03/04 Vary mixture amounts during circulation and measure changes in base temperature.
2015/03/03 Study effects of 1K Pot temperature on base temperature, Helium Transfer, reached 338mK (lowest temperature yet)
2015/03/02 (Mon) Condense and Circulate. Study oscillations in base temperature over all thermometers.
2015/03/01
2015/02/28 Helium Transfer
2015/02/27 Study oscillations in base temperatures over all thermometers. Single Shot Test.
2015/02/26 Study oscillations and effects of unplugging Fischer connectors. Helium Transfer.
2015/02/25 Condense and circulate. Study effects on temperature of unplugging Fischer connectors.
2015/02/24 Throughput test at LN2 temperatures. Long Helium Transfer.
2015/02/23 (Mon) Throughput test at ~25K. He3 IVC leak check.
2015/02/22 Results of unplugging Mixing Chamber Heater overnight. Condense and circulate. Study oscillations in base temperature.
2015/02/21 Helium transfer. Suspect Mixing Chamber Heater.
2015/02/20 Raising 1K Pot temperature lowers base temperature to 382mK. Single Shot test. Condense and circulate.
2015/02/19 Leak check He3 pump exhaust lines. Helium Transfer. Add mixture from cryopump. Condense and circulate.
2015/02/18 Cryopump He3 pump exhaust lines. 100K Throughput Test. Helium Transfer.
2015/02/17 LN2 Blowout. Add cyropump mixture back to dump.
2015/02/16 (Mon) LN2 transfer.
2015/02/13 Warm up.
2015/02/12 Condense with He4 gas.
2015/02/11 End He3 pump oil back-pumping test. He4 gas throughput tests. LN2 Blowout. Helium Transfer.
2015/02/10 Raise Dewar. LN2 Transfer.

Maintenance

Run Det Det Type Source Purpose
NA NA NA NA Make fridge base-temperature capable.
2014/12/16
2014/12/17 G2 rises indicating leak in He3 pump. LN2 temperature throughput test shows no flow. Leak check shows no leak in He cold trap. Bypass fridge lines using He cold trap.
2014/12/18 Room temperature and LHe temperature throughput test through He cold trap show flow. Reconnect copper condenser line to IGH/fridge. Remove He3 pump from circulation lines.
2014/12/19 LN2 transfer. Flow test at LN2 temperatures shows minimal flow.
2014/12/30
2015/01/02 Monitor He3 pump for death rattles. None observed.
2015/01/05 Turbopump exhaust lines of isolated He3 pump. Isolate He3 pump and monitor pressure.
2015/01/06 Room temperature throughput test. LN2 transfer.
2015/01/07 Throughput test at LN2 temperature shows no flow.
2015/01/08 Remove copper condenser line and bypass using He cold trap.
2015/01/09 Room temperature flow/throughput tests show slow flow - due to He cold trap? LN2 transfer.
2015/01/12 Throughput test at LN2 temperature through LN2 cold trap shows no flow.
2015/01/13 Room temperature flow tests. Replace copper condenser line. Bypass still line using He cold trap.
2015/01/14 Room temperature throughput test. LN2 transfer.
2015/01/15 Controlled warm-up flow test w/o exchange gas: flow observed at ~110K.
2015/01/16 LN2 transfer.
2015/01/19 Lower dewar. Controlled warm-up test aborted due to observed flow.
2015/01/26 Cool Down

Run 49

Run Det Det Type Source Purpose
49 NA NAN NA Maintenance Run, no tower or striplines .

Run 48

Run Det Det Type Source Purpose
48 NA NAN NA Maintenance Run, no tower or striplines .
2014/08/05 Cryocleaning
2014/08/06 Cryocleaning, throughput test, leak check
2014/08/07 Cryocleaning, raise dewar. Nitrogen transfer
2014/08/08 Cryocleaning, raise dewar. Nitrogen blowout.
2014/08/11 Nitrogen transfer
2014/08/12 Nitrogen blowout. Helium transfer
2014/08/13 Condense and circulate.
2014/08/14 Helium transfer. Clean cold traps.
2014/08/15
2014/08/16
2014/08/17
2014/08/18
2014/08/19
2014/08/20
2014/08/21
2014/08/22
2014/08/23
2014/08/24