2018/08/17 (Friday)
| 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. MIDAS crashed at some point around 0341 during the 5th series. | |
| 1010 | Fill LN2 cold trap bath. |
| 1010 | Restart MIDAS, dial down HV, flash for 30 sec |
| 1030 | Tower/MC/Coldplate = 31.2/29.8/182 mK, Still = 1.4±0.1 K / 0.075 mbar, G1/G2 = 122/114 mbar, 1K Pot = 1.62 K / 24 mbar, Turbo on IVC = 1.2 nbar, MB = 67.3% |
| 1125 | SQUIDTuningGUI failing to start with error: TMidasControl::connect: Connecting to experiment “cdms_UMN” on host “cdms2.spa.umn.edu:7071” TMidasControl::connect: Cannot connect to MIDAS, status 503. Restarting MIDAS doesn't help. Restarting the terminal in the vnc session doesn't help. Restarting the vnc session itself did the trick. Not sure why, not gonna think too hard about it. |
| 1148 | Start 1 x 2hr 40 V background 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) → x10/x10 attenuator → DCRC4PB/PA, Driver Gains = 1/1, PhononWaveFormLength = 1024 (512 samples), PhononPrepulseSamples = 64 (64 samples) 1000 BOR randoms, trigger on DCRC3pB/D threshold = 7/9 |
| 1307 | Begin LHe transfer @ MB = 62.0% |
| 1439 | End LHe transfer @ MB = 94.2% |
| 1508 | Start 10 x 2hr 40 V background datasets each split into 10min subruns, with CDMS and NaI detectors running and DCRC2 as HV controller. Using sequence HVscan-40×10-15_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) → x10/x10 attenuator → DCRC4PB/PA, Driver Gains = 1/1, PhononWaveFormLength = 1024 (512 samples), PhononPrepulseSamples = 64 (64 samples) 1000 BOR randoms, trigger on DCRC3pB/D threshold = 7/9 |
| 1700 | Fill LN2 cold trap full. |