| 0940 | Reestablish MIDAS browser interface as per instructions. Sequence restarts about 40 seconds into Loop 8 of 20. |
| 0945 | HV = 50.01 V, Vtest = 2.7 mV, nice and stable. Vdetector = 48.8 V |
| 0945 | Tower = 32.9 mK, Main bath = 38.2% |
| 0950 | Fill LN2 cold trap bath. |
| 1025 | 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 |
| 1032 | Tower/MC/Coldplate = 32.9/30.9/183 mK, Still = 1.2 K / 0.110 mbar, G1/G2 = 235/217 mbar, 1K Pot = 1.692 K / 28 mbar. Main Bath = 37.0%. Boil off rate: a bit faster than slow mode (predicted level: 40.3% ) |
| 1140 | Dial HV down to 0V |
| 1140 | Begin a 30 minute bake. Use Flash tool, DCRCs 1-2, On 1800 s, Off 5 s, Duration 0.6 hours |
| 1155 | Start LHe transfer (MB = 34.9 %) |
| 1226 | Start 1 5-minute TEST series of 1-sided 0V HV coincidence data with no randoms and a 1500ADC bin threshold trigger on DCRC4pA. 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
This will be the comparison case for tests of reducing the lengths of unused channels to see if we can decrease the lag time of the DAQ and increase the read efficiency. |
| 1237 | End LHe transfer (MB = 92.5%) |
| 1240 | Change ChargeWaveFormLength from 16384 to 128 on DCRCs 1,2, and 4. |
| 1241 | Start 1 5-minute TEST series of 1-sided 0V HV coincidence data with no randoms and a 1500ADC bin threshold trigger on DCRC4pA. 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, with shortened charge traces. |
| 1320 | Both of the above test series processed without any problems. The standard series recorded 9832 events in five minutes, but the one with reduced charge trace lengths recorded 18109 events. So it seems there's a nearly x2 increase in read efficiency. We'll stick with ChargeWaveFormLength = 128 (0.0256 ms) for now (and should consider doing so for future runs when charge channels are not relevant). |
| 1320 | Dial HV up to 65 V. After 5 minutes dial down to 50V. |
| 1335 | HV = 50.00 V, Vtest = 2.3 mV → Vdetector = 49.0 V |
| 1338 | 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 |
| 1345 | oops, trigger was not enabled correctly. Enable DCRC2pD trigger now. |
| 1335 | HV = 50.00 V, Vtest = 2.5 mV, steady → Vdetector = 48.9 V |
| 1444 | Start 19 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 |
| 1725 | Fill LN2 cold trap bath. |