| | Setup: DIB1/3/4 → 3.2 MHz filters 3/1/2 → cable 3/1/2 →gender changer 3/1/2 → HVConn 1/3/2 → HV 1/2 → DCRC55/DCRC33 |
| | PuBe source in paraffin barrel behind shield (west side) |
| | Took NaI-triggered data overnight @50V, looks OK |
| 0905 | HV = 50.00 V, Vtest = 2.1 mV, nice and stable. Vdetector = 49.1 V |
| 0905 | Tower = 32.9 mK, Main bath = 31.3% |
| 0950 | Overnight sequence is now finished |
| 0955 | Fill LN2 cold trap bath. |
| 1015 | Start 1 1-hour data series of 1-sided 50V HV coincidence data with Frontend Gain = (20/20/5)/(3/5/2), OG = 4/2, QET biases = table from Apr 28 with 1000 beginning randoms, no flashing, and a 22ADC bin threshold trigger on DCRC2 pD (Side1 pF). Running OR trigger of NaI detectors with PuBe source on west side of shield. NaI detector C has 311 mV threshold and detector B has 288 mV threshold |
| 1200 | Dial HV down to 0V |
| 1215 | Start 30 minute bake |
| 1320 | Tower has cooled to below 36 mK. Dial HV up to 65 V |
| 1345 | Dial HV down to 50.00 V |
| 1426 | Start LHe transfer (MB = 21.8%) |
| 1447 | Tower/MC/Coldplate = 32.6/30.4/188 mK, Still = 1.2 K / 0.110 mbar, G1/G2 = 232/235 mbar, 1K Pot = 1.657 K / 22 mbar. |
| 1505 | The 250L Dewar has run empty during the transfer, with MB = 59.6%. We don't want to do another tomorrow, so we are going to get another 100L Dewar and re-start the transfer. |
| 1542 | End LHe transfer (MB = 94.8%) |
| 1551 | Start 1 1-hour data series of 1-sided 50V HV coincidence data with Frontend Gain = (20/20/4)/(3/5/2), OG = 4/2, QET biases = table from Apr 28 with 1000 beginning randoms, no flashing, and a 22ADC bin threshold trigger on DCRC2 pD (Side1 pF). Running OR trigger of NaI detectors with PuBe source on west side of shield. NaI detector C has 311 mV threshold and detector B has 288 mV threshold |
| 1655 | Start 17 1-hour data series of 1-sided 50V HV coincidence data with Frontend Gain = (20/20/5)/(3/5/2), OG = 4/2, QET biases = table from Apr 28, with 1000 beginning randoms, no flashing, and a 1500ADC bin threshold trigger on DCRC4 pA (TTL signal) Running OR trigger of NaI detectors with PuBe source on west side of shield. NaI detector C has 311 mV threshold and detector B has 288 mV threshold |
| 1659 | Fill LN2 cold trap full. |