2018/08/11 (Saturday)
| Setup: DIB1/3/4 → 3.2 MHz filters 2/3/1 → cable 3/1/2 → gender changer 3/?/2 → HVConn 1/3/2 → HV 1/2 → DCRC55(1)/DCRC50(3) 1.1kV → NaI B/C → Ortec 452(gain=5, shaping = 6 us, output=10V) / Ortec 575A(gain=10, shaping = 3us) → DCRCX(4) DCRC33(2) → kepco 1kV power supply → HV input |
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| status: Took SiHV+NaI PuBe data overnight. Vbias very close to 40 V, Vtest around 5 mV. | |
| Data from 07180810_1505 to 07180810_2137 looks good, but starting at 07180810_2147, DCRC1pB/3pC railed low. So the first 53% of the data is OK. | |
| 1000 | Tower = 33.1 mK, Still = 0.090 mbar, G1/G2 = 119/111 mbar, 1K Pot = 1.64 K / 30 mbar |
| 1140 | Dial HV up to 40V with 15% prebias using appropriate script |
| 1237 | Start test data series to remotely adjust driver offsets |
| 1324 | Stop data. Adjusted offsets on DCRC1pB/3pC, -0.27/0.29 → -0.5/0.1. Now they aren't railed. |
| 1329 | Dial HV down to 0 using appropriate sequence. |
| 1355 | Flash detector (DCRCs 1,3) for 30 seconds |
| 1430 | Start 5 x 2hr 40 V PuBe datasets each split into 10min subruns, with CDMS and NaI detectors running and DCRC2 as HV controller. Using sequence HVscan-40×6-15_5PreBias-30Flash 30wait-2hrData-10minSubRun.msl CDMS detector: Driver Gains = 2x, QET biases = (280/260/305)/(140/280/295) uA, Front-End Gains = 10 NaI detector: 1.1kV → NaI B/C → Ortec 452(gain=5, shaping = 6 us, output=10V, Pos) / Ortec 575A(gain=10, shaping = 3us, Pos) → DCRC4PB/PA, Driver Gains = 1/1, PhononWaveFormLength = 1024 (512 samples), PhononPrepulseSamples = 64 (64 samples) 1000 BOR randoms, trigger on DCRC3pB/D threshold = 7/9 |
| 1450 | Fill LN2 cold trap bath. MB = 59.0% |