2019/06/08 (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 Two walls of the lead/poly shield are up. |
|---|---|
| Create a new sequence to drift the voltage 2.64 V/min = 0.044 V/s. |
[fritts@jiajin /home/hep/cdmssoft/scdmsDAQ/MidasDAQ/online/scripts/pysequencer]: python HVscan.py -iDCRC 2 -HVs 200 -HVcalFile HV_calibrations/HV_DCRC2_control_cals_440V_190603.txt -HVdriftRate 0.044 -HVpreBias 10/2 -tSeries 75 -DCRCs2Flash 1,4 > ../../sequencer/HVdrift_200V_2p64VPM_prebias_10_2_dur_75min_flashDCRC_1_4.msl
| 0947 | Meant to start a data series but apparently failed to hit the Start button |
|---|---|
| 1110 | Start a 75 min series at HV = 200→400V, rate +2.64V/min with 10% prebias for 2 minutes, flash at end with 30 min wait. CDMS detector: Driver Gains = 1x, DCRC4/1 QET biases = (420/400/440)/(420/400/450) uA, Front-End Gains = (2/2/3)/(5/5/5) 1000 BOR and 1000 EOR randoms, trigger on DCRC1pB/C/D threshold = 6/6/6. Use sequence HVdrift_200V_2p64VPM_prebias_10_2_dur_75min_flashDCRC_1_4.msl |
| 1355 | Tower/MC/Coldplate = 44.0/31.1/176 mK, Still = 1.02 K / 0.090 mbar, G1/G2 = 172/162 mbar, 1K Pot = 1.63 K / 22 mbar. MB = 36.8% coldplate and still are reading in their “low” modes for whatever reason Tower temperature continues to fall linearly, slowly |
| 1358 | Fill LN2 Cold trap bath |
| 1415 | Commence LHe transfer. MB=36.8% |
| 1420 | Note: Eye of Gnome (eog at command line) seems to be a decent viewer for the webcam images. |
| 1431 | Gah, we set the camera for 20s intervals instead of 2s. This makes it difficult to estimate the recovery level when we started the transfer. Luckily it was only a few minutes away from a dial roll-over, so we made our best estimate from there using the rate once we started taking 2s images again. |
| 1455 | Cease LHe transfer. MB=93.4% |
| 1610 | Start a 75 min series at HV = 200→400V, rate +2.64V/min with 10% prebias for 2 minutes, flash at end with 30 min wait. CDMS detector: Driver Gains = 1x, DCRC4/1 QET biases = (420/400/440)/(420/400/450) uA, Front-End Gains = (2/2/3)/(5/5/5) 1000 BOR and 1000 EOR randoms, trigger on DCRC1pB/C/D threshold = 6/6/6. Use sequence HVdrift_200V_2p64VPM_prebias_10_2_dur_75min_flashDCRC_1_4.msl |
| 1910 | Start a 75 min series at HV = 200→400V, rate +2.64V/min with 10% prebias for 2 minutes, flash at end with 30 min wait. CDMS detector: Driver Gains = 1x, DCRC4/1 QET biases = (420/400/440)/(420/400/450) uA, Front-End Gains = (2/2/3)/(5/5/5) 1000 BOR and 1000 EOR randoms, trigger on DCRC1pB/C/D threshold = 6/6/6. Use sequence HVdrift_200V_2p64VPM_prebias_10_2_dur_75min_flashDCRC_1_4.msl |
| 2138 | Start a 75 min series at HV = 200→400V, rate +2.64V/min with 10% prebias for 2 minutes, flash at end with 30 min wait. CDMS detector: Driver Gains = 1x, DCRC4/1 QET biases = (420/400/440)/(420/400/450) uA, Front-End Gains = (2/2/3)/(5/5/5) 1000 BOR and 1000 EOR randoms, trigger on DCRC1pB/C/D threshold = 6/6/6. Use sequence HVdrift_200V_2p64VPM_prebias_10_2_dur_75min_flashDCRC_1_4.msl |
| DCRC4pB railed during Dump 10 |