2022/07/03 (Sunday)
- Lab in-personnel: Zach
| 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 source behind lead wall. NaI trigger window -t10760 -T15760 (7.6-11.2 MeV) |
| 1450 | MC/Coldplate = 29.2/153 mK, Still = 1.09 K / 0.110 mbar / 0 mW, G1/G2 = 129/137 mbar, 1K Pot = 60° / 1.55 K / 8.5±0.5 mbar, MB = 35.5% |
| 1455 | Power-cycle DCRC1. Yesterday MIDAS kept crashing every time you tried to start a series if DCRC1 was enabled. |
| 1503 | Begin LHe transfer @ MB = 34.7% |
| 1512 | Took LN2 dewar to be filled |
| 1520 | Successfully restart DAQ programs and start a MIDAS run to look at pulses, with all DCRCs enabled. |
| 1525 | Check phonon channels. Adjust DCRC3pA offset to 0.55. This was the stable value a couple weeks ago, but yesterday I had to readjust it, SQUID had locked at a different phase. All channels are at there default offsets from a couple weeks ago, that's encouraging. |
| 1544 | Ended LHe transfer @ MB = 90.9 % |
| 1630 | Brought back LN2 dewar, filled LN2 cold trap dewar, set up purge. |
| As it turns out the dewar still had enough liquid LN2, but the pressure was too low, so I only filled it an extra 197.5 lbs (110.7 L). | |
| 1855 | DAQ crashed a half hour ago I guess, Tower_fe stopped. It restarted and I was able to start a run so that's good, but it's a little worrisome. |
| 1900 | Pulses look fine |
| 1904 | Start 0 V PuBe data series 45 min long, with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC3pD threshold 10. Start series with the Start Button. |
| 1905 | MC = 28.7 mK |
| 1954 | Dial HV up to -227.1 V using RootSequencer for prebias. Set it to rise about 5 V/s with 0.25 second steps. |
| Some elevated baselines and some weak-looking pulses but no jagged noise, so probably we don't have high leakage. | |
| 2000 | After 5 minutes dial HV down to -197.3 V |
| Hmm baselines are still elevated and some pulses look weak. Well whatever. | |
| We'll start with some Si-triggered data for 5 or 10 minutes then switch to NaI-triggered | |
| 2005 | Start -197.3 V PuBe data series 6 min long, with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC3pD threshold 10 (Si-triggered). Start series with the Start Button. |
| oops, actually I had the NaI trigger on too. Doesn't really matter, that's only 0.7 Hz. | |
| 2005 | MC = 28.8 mK |
| 2012 | Start -197.3 V PuBe data series 90 min long, with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC4pA threshold 10 (NaI-triggered). Start series with the Start Button. |
| 2140 | MC = 28.9 mK |
| 2043 | Start -197.3 V PuBe data series 6 min long, with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC3pD threshold 10 (Si-triggered). Start series with the Start Button. |
| 2151 | Start -197.3 V PuBe data series 11h52m (708 dumps) long, with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC4pA threshold 10 (NaI-triggered). Start series with the Start Button. |