2018/08/25 (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: link to /data/cdms1 broke yesterday, so no overnight data | |
| 1200 | Rename the broken symlink /data/chocula/k100/midasraw to midasraw_temp, then create a real link on chocula called /midasraw with subdirectories /byseries and /livedata. This should allow us to take data and store it on chocula for the time being. |
| 1210 | Start 1 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-40×1-15_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 aborted |
| 1230 | Something is apparently wrong with the data taking. Files are being written but they are very small and don't open with BatViewer. Will need to investigate. |
| 1240 | Noticed that the DAQ programs (dcrc driver, tower fe, trigger fe) weren't on. Stop sequence and reduce HV from 40 to 0 V. |
| 1242 | Start 1 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-40×1-15_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 |
| 1256 | Data is working but DCRC3pC is railed low. Try a simple relock |
| 1304 | DCRC3pC is back but baseline is higher than I like. Change driver offset from -0.25 → -0.15 |
| 1314 | DCRC3pC baseline still kinda high. Change driver offset from -0.15 → -0.05 |
| 1600 | Tower/MC/Coldplate = 30.3/29.1/179 mK, Still = 1.2±0.1 K / 0.070 mbar, G1/G2 = 111/109 mbar, 1K Pot = 1.61 K / 20 mbar, Turbo on IVC = 1.0 nbar, MB = 28.3% |
| 1605 | Fill LN2 cold trap bath |
| 1609 | Begin LHe transfer, MB = 28.3% |
| 1615 | Move NaI attenuators to Ortec amplifier inputs. |
| 1617 | Start 30min NaI calibration dataset NaI detector: 1.1kV → NaI B/C → x10/x10 attenuator → 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 DCRC4pA/B threshold = 7/5 |
| 1621 | Not seeing a ton of pulses. Increase trigger thresholds to DCRC4pA/B threshold = 10/10 |
| 1655 | Move NaI attenuators back to Ortec amplifier outputs. |
| 1700 | Cease LHe transfer, MB = 92.2% |
| 1711 | Start 7 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-40×7-15_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 |