2019/07/20 (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 → DCRCX(4)/DCRC55(1) DCRC33(2) → 1kV power supply → HV input Three walls of the lead/poly shield are up. |
|---|---|
| Status: Taking data overnight, base temp around 39 mK. | |
| 1032 | Start a sequence of 8 @ 50 min series at HV = 180→306V, rate 2.49V/min, with 10% prebias for 2 minutes, flash at end with 30 min wait. CDMS detector: Driver Gains = 1x, DCRC4/1 QET biases = (490/400/495)/(420/480/450) uA, Front-End Gains = (2/2/3)/(5/5/5) 1000 BOR, 5Hz InRun randoms, trigger on DCRC1pD threshold = 6, baseline/sample length = 120/28 (standard 16/5), phonon pre-pulse 500 (standard is 500). Use sequence HVdrift_8X180V_2p49VPM_loopversion_prebias_10_2_dur_50min_flashDCRC_1_4.msl |
| HV leakage is lower today than yesterday, looks like it's back to the previous normal. | |
| 1345 | Fill LN2 cold trap bath. |
| 1355 | Tower/MC/Coldplate = 39.2/32.1/203 mK Still = 1.29K/ 0.1 mbar/ 0 mW, G1/G2= 108.5/111.1 mbar, 1K Pot = 1.717 K/ 90 mbar (plus or minus 10 mbar, it is oscillating continually). MB= 58.7% |
| 2248 | Looks like the thermometer got left on the “Still” setting. Fridge pressures look normal otherwise. |