2018/09/13 (Thursday)
| 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) → x10/x10 attenuator → DCRCX(4) DCRC33(2) → kepco 1kV power supply → HV input |
|
| status: | Took 133Ba data overnight at -80V. |
| 0840 | Tower/MC/Coldplate = 31.6/30.1/195 mK, Still = 1.0 mW / 1.4±0.1 K / 0.085 mbar, G1/G2 = 122/115 mbar, 1K Pot = 1.60 K / 19 mbar, Turbo on IVC = 0.86 nbar, MB = 74.5% |
| 0845 | Fill LN2 cold trap bath. |
| 1215 | DCRC1pB is railed, re-lock it. |
| 1240 | Stop data taking script just after flash. |
| 1242 | Remove 22Na source from safe and place on top of SW corner of shield. Replace 133Ba source in safe. |
| 1250 | Bring PuBe source into lab and place on west side of shield, just south of the southwest fridge stand post. |
| 1302 | Start 1 x 2hr NaI calibration dataset split into 10min subruns (HV=0), with CDMS and NaI detectors running and DCRC2 as HV controller. Using sequence timed_subrun.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 DCRC4pA/B threshold = 10/10 |
| 1535 | Return 22Na source to safe. |
| 1550 | Return PuBe to storage in PAN 443 |
| 1612 | Remove 22Na source from safe and place inside, at bottom of lead shield on the north-west side of the fridge. This seems to be about as close as we can get without too much pileup and without exposing the whole lab to the source. |
| 1627 | Start 10 x 2hr Na datasets at -80V split into 10min subruns, with CDMS and NaI detectors running and DCRC2 as HV controller. Using sequence HVscan-80×10-15_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/C/D threshold = 7/10/9 |
| 1630 | Fill LN2 cold trap full. |