| | 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) |
| 0855 | Fill LN2 cold trap bath. Some concern over the fact that it may not have been filled yesterday - nothing on the run diary to indicate it was filled. So far this morning though the fridge temperatures and pressures seem close to normal. |
| | Took NaI-triggered data overnight at 50V, looks OK. |
| 0900 | Tower/MC/Coldplate = 33.0/30.6/189 mK, Still = 1.3 K / 0.110 mbar, G1/G2 = 220/210 mbar, 1K Pot = 1.683 K / 26 mbar. Main Bath = 35.4%. Boil off rate: faster than slow mode. (predicted level: 42.1%) |
| 0905 | HV = 50.00 V, Vtest = 3.9 mV → Vdetector = 48.3 V |
| | Front-end gains listed in the run diary yesterday are not accurate, do not agree with current settings. I guess they were copied and pasted from who knows how old run diary entries. Check recent ODB files to get the actual values and correct run diary… |
| 1041 | Start 1 1-hour data series of 1-sided 50V HV coincidence data with Frontend Gain = (15/15/2)/(3/4/4), OG = 4/2, QET biases = table from Apr 28, with 1000 beginning randoms, no flashing, and a 6ADC bin threshold trigger on DCRC1 pA (Side1 pE). 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 |
| 1101 | Increase trigger threshold from 6 to 12 because detector is triggering too often. I think overall noise is higher now than last week. |
| 1118 | Increase trigger threshold from 12 to 24 because detector is triggering too often. |
| 1131 | Decrease trigger threshold from 24 to 20. |
| | we'll take another calibration series to get some more stats with a good trigger setting. |
| 1144 | Start 1 1-hour data series of 1-sided 50V HV coincidence data with Frontend Gain = (15/15/2)/(3/4/4), OG = 4/2, QET biases = table from Apr 28, with 1000 beginning randoms, no flashing, and a 20ADC bin threshold trigger on DCRC1 pA (Side1 pE). 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 |
| oops | It looks like maybe this data series was set for 0 initial randoms and 10Hz in-run randoms… |
| 1250 | Dial HV down to 0V |
| 1300 | Start 30 minute bake with DCRCs1&2 |
| 1302 | Start LHe transfer (MB = 29.3%) |
| 1408 | Finish LHe transfer (MB = 91.1%) |
| 1435 | Start 60 minute bake with DCRCs1&2 |
| 1645 | Fill LN2 cold trap bath |
| 1902 | took 22Na source out and put near fridge, kind of on the fishing pole (meter stick) setup, on the southeast aluminum support, there is a radiation sign there, the purpose is to calibrate the HPGe detector, which is operational |
| 1952 | switched to new DAQ for diagnostics, behaviour may vary. It kind of works. Turning on frontends works, Starting a run works, Can view pulses on DCRC1, but switching to DCRC2 causes the SQUID tuning GUI to “think” that a frontend stopped even though it has not. Troubleshoot that tomorrow, didn't try to write any data to disk |