2019/07/05 (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 → DCRCX(4)/DCRC55(1) DCRC33(2) → 1kV power supply → HV input Three walls of the lead/poly shield are up. |
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- Data from 6 series block July 3-4
- Linear calibration using unbalanced PTOFamps based on high-pF part of 1.3 keV line.
- diagonal indicates fit to radial position dependence
- First and third red lines indicate position of 160 eV and 10.3 keV lines
- Where is the 160 eV line??
- Note that bottom of 1.3 keV line is missing, present in 10.3 keV line - I guess a triggering effect (trigger on pF only)
- Based on the number of high-pF events in the 1.3 keV line, the 160 eV line should have 9 high-pF events.
- Looking at the outer edge of the noise blob, many of these events have the first-8-bin glitch
| 0930 | Fill LN2 coldtrap bath from bomb dewar Put PuBe source into fridge shield for activation |
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| 0943 | Tower/MC/Coldplate = 39.0/28.9/198 mK, Still = 1.36 K / 0.18 mbar / 6 mW, G1/G2 = 197/186 mbar, 1K Pot = 1.613 K / 19 mbar. MB = 67.6% |
| 1300 | PuBe source taken out of shield after 3.5 hours |
| 1315 | Check event rate, starting 3.5 min and ending 6 min after removing source. Count number of visible pulses in 50 traces, three trials: count 20, 31, 34 pulses. 173±19 Hz |
| 1330 | Check event rate, starting 25 min after removing source. Count number of visible pulses in 50 traces, three trials: count 24, 25, 23 pulses. 146±17 Hz |
| compare with 20 minutes after the last activation on 27 June, 103 Hz | |
| 1355 | Lead stack to shield PuBe source built |
| 1400 | fill LN2 coldtrap bath from bomb dewar |
| 1505 | Check event rate, starting 120 min after removing source. Count number of visible pulses in 50 traces, three trials: count 20, 15, 25 pulses. 122±16 Hz |
| 1755 | Check event rate, starting 290 min after removing source. Count number of visible pulses in 50 traces, three trials: count 11, 13, 14 pulses. 77±13 Hz |
| 1757 | 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 = 3, baseline/sample length = 20/30 (standard 5/16),phonon pre-pulse 600 (standard is 500). Use sequence HVdrift_8X180V_2p49VPM_loopversion_prebias_10_2_dur_50min_flashDCRC_1_4.msl |