2022/10/20 (Thursday)
- 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 on West side of lead/poly shield. |
| NaI trigger window: 7.6-11.0 MeV | |
| Cooled to base yesterday after fifteenth 5K pumpout. Temperature spikes began at 5:05 am | |
| Taking NaI-triggered data overnight (at new lowered upper threshold). DAQ crash happened at 7:42, TowerFE crashed. Dump 533 is the last non-empty dump. | |
| 0845 | MC base = 29.8 mK. Most spikes peak below 30.2 mK, some above 30.8 mK |
| 0849 | Start -82.4 V PuBe data series 63 min long, SiHV-triggered with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC1pB threshold 10. Start series with the Start Button |
| 0850 | HV = -91.6 V, Vtest = -20.9 mV, Ileak = -23 uA, Vdet = -82.4 V (90%). |
| 0954 | Start -82.4 V PuBe data series 524 min long, NaI-triggered with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC4pA threshold 20. Start series with the Start Button |
| 1308 | MC/Coldplate =32.1/150 mK, Still = 1.09 K / 0.090 mbar / 0 mW, G1/G2 = 103/109 mbar, 1K Pot = 45° / 1.57 K / 10±1 mbar, MB = 69.2% |
| 1310 | Fill LN2 cold trap bath |
| 1330 | Spare helium cylinder arrived, bring into lab |
| 1846 | Start -82.4 V PuBe data series 43 good min long, SiHV-triggered with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC1pB threshold 10. Start series with the Start Button |
| 1847 | HV = -91.7 V, Vtest = -21.1 mV, Ileak = -23.2 uA, Vdet = -82.4 V (90%). |
| There was some kind of DAQ crash during the last series. Dumps after 43 are empty | |
| 1948 | Start -82.5 V PuBe data series 841 min long, NaI-triggered with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC4pA threshold 20. Start series with the Start Button |
| 1950 | HV = -91.7 V, Vtest = -21 mV, Ileak = -23.1 uA, Vdet = -82.5 V (90%). |
| 1950 | MC base = 30.3 mK |
| 2110 | DCRC1pA baseline: -0.824 V |