2022/07/06 (Wednesday)
- Lab in-personnel: Giulia, Matt
| 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) |
| 0830 | Check phonon channels. Relock three of them to get them back to the usual ~-0.8V baselines. |
| 0836 | Start 0 V PuBe data series 122 min long, with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC3pD threshold 10 (Si-triggered). Start series with the Start Button. |
| 0840 | MC = 29.0 mK |
| 0950 | MC/Coldplate = 28.9/152 mK, Still = 1.08 K / 0.095 mbar / 0 mW, G1/G2 = 116/112 mbar, 1K Pot = 60° / 1.55 K / 8.0±0.5 mbar, MB = 72.2% |
| 1000 | Filled LN2 cold trap dewar. |
| 1040 | Dial HV up to -230 V using RootSequencer for prebias. |
| 1045 | Dial HV down to -200 V (nominal) -197.3 V (true) |
| 1055 | Check Vtest on the HV board: -37 mV, a bit high, but not too bad |
| 1112 | Start -197.3 V PuBe data series 100 min long, with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC4pA threshold 20 (NaI-triggered). Start series with the Start Button. |
| 1145 | Check Vtest on the HV board: around -25 mV, better |
| 1220 | Check Vtest on the HV board: around -30 mV, higher, but not too bad |
| 1254 | Start -197.3 V PuBe data series 8 min long, with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC3pD threshold 10 (Si-triggered). Start series with the Start Button. |
| 1303 | Start -197.3 V PuBe data series 64 good minutes long (see below), with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC4pA threshold 20 (NaI-triggered). Start series with the Start Button. |
| 1220 | Check Vtest on the HV board: around -19 mV, better |
| 1408 | After Dump 64 something weird happened to the data - dumps before this were ~7MB, after this they jumped to 40-70MB. Answer: Zach and Kitty changed the NaI DAQ firmware at this time and reset the trigger conditions. |
| 1453 | After Dump 108 dumps are empty. Tower_FE crashed, apparently. |
| 1600 | Check Vtest on the HV board: around -34 mV |
| 1652 | 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. |
| 1659 | Start -197.3 V PuBe data series 218 minutes long, with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC4pA threshold 20 (NaI-triggered). Start series with the Start Button. |
| 1700 | Check Vtest on the HV board: around -27 mV |
| 1745 | Check Vtest on the HV board: around -10 mV. May have gotten better because I tightened up the purge bag a little. |
| 2041 | Start -197.3 V PuBe data series ## min long, with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC3pD threshold 10 (Si-triggered). Start series with the Start Button. |
| 2045 | MC = 29.1 mK |
| 2048 | Start -197.3 V PuBe data series 575 minutes long, with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC4pA threshold 20 (NaI-triggered). Start series with the Start Button. |