2022/09/09 (Friday)
- Lab in-personnel: Giulia
| Status | Run 76 in progress |
|---|---|
| Setup | Cables 2/3/1 → diverter/nothing/nothing → Side2-readout HV CONN 1/3/2 → HV 1(L)/2(R) → DCRC50(3)/DCRC55(1), DCRC33(2)→HV control, NaI trigger signal → DCRCX(4) Lead/poly shield fully assembled. Boron-filled socks covering NaI detectors. PuBe behind lead wall on West side of lead/poly shield. |
| NaI trigger window: 7.6-11.2 MeV | |
| Cooled to base yesterday after fifth 5K pumpout. Temperature spikes returned as usual, this time at 7:50 am | |
| 0925 | Plug DCRCs 1&3. |
| 0930 | Fill LN2 cold trap dewar |
| 0940 | MC/Coldplate = 27.1/148 mK, Still = 1.12 K / 0.080 mbar / 0 mW, G1/G2 = 144/143 mbar, 1K Pot = 60° / 1.59 K / 21±1 mbar, MB = 75.8 % |
| 1045 | Restart MIDAS and DAQ programs (after lots of disabling/reenabling DCRCs 1,3,4) |
| 1110 | Pulse viewer (SQUIDtuningGUI) isn't working. Recently our main data directories /data/chocula and /data/cdms1 were migrated to new disks by IT. Computers were rebooted to remount the networked drives. Now when I try SQUIDtuningGUI on cdms1 I get an error, something about memory corruption. |
| 1115 | Start 0V test series, SiHV-triggered (DCRC1pB 10). |
| Checked traces using BatViewer. Pulses look OK. One channel has a shifted offset. Can look at the baseline in raw data pulses and convert to Volts with following conversion: baseline/6553.6-1.25 Adjust offsets |
|
| 1200 | Start 0V test series, SiHV-triggered (DCRC1pB 10). |
| looks like baselines are all near -0.8 V again (2949 bins) | |
| 1256 | Start 0 V PuBe data series 45 min long, SiHV-triggered, with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC1pB threshold 10. Start series with the Start Button |
| 1340 | Start 0 V PuBe data series 182 min long, both NaI-&SiHV-triggered, with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC1pB/DCRC4pA threshold 10/20. Start series with the Start Button |
| Had both triggers set in this series by mistake. | |
| 1648 | Start 0 V PuBe data series 196 min long, NaI-triggered, with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC4pA threshold 20. Start series with the Start Button |
| 1702 | Between 5:02pm and 5:20pm MC temperature wandered up to 63 mK then back down. Should see if that has an effect on the data. |
| 2010 | Dial HV up to -27.6V nominal, -25.3V actual, for 15% prebias (using RootSequencer) |
| note: forgot to open LN2 Dewar vent for Ebox purge. We'll see how bad the leakage is… actually checking later it looks like it was open and flowing. |
|
| 2016 | Dial HV down to -24.0V nominal, -21.7V actual |
| 2023 | HV = -21.7 V, Vtest = -2.2 mV, Ileak = -2.4 uA, Vdet = -20.7 V (96%). (good) |
| 2023 | Start -20.7 V PuBe data series 38 min long, SiHV-triggered with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC1pB threshold 10. Start series with the Start Button |
| 2025 | Check pulses with pulse viewer, they look good |
| 2102 | Start -20.9 V PuBe data series 25 good min long, NaI-triggered with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC1pB threshold 10. Start series with the Start Button |
| 2110 | HV = -21.7 V, Vtest = -1.8 mV, Ileak = -2 uA, Vdet = -20.9 V (96%). |
| TowerFE crashed, need to restart series | |
| 2243 | Start -20.9 V PuBe data series 796 min (13.3 hr) long, NaI-triggered with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC1pB threshold 10. Start series with the Start Button |
| 2245 | HV = -21.7 V, Vtest = -1.7 mV, Ileak = -1.9 uA, Vdet = -20.9 V (97%). |