| | 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) |
| 1506 | Overnight data looks good. |
| 1507 | Dial HV down to 0V. Start 1 hr minute bake on DCRCs 1&2. |
| 1721 | waited a bit long on the bake, it was more like 2.25 hrs turn up voltage to 65V for prebias when dropped below 90 mK (is it OK to prebias when temp elevated?, probably) |
| 1727 | turn bias back down to 50V, but need to wait for temperature to fully recover before starting another run |
| 1817 | Start 16 1-hour data series of 1-sided 50V HV coincidence data with Frontend Gain = (15/15/4)/(3/5/2)(15/15/2)/(3/4/4), OG = 4/2, QET biases = table from Apr 28, with 1000 beginning randoms, no flashing, and a 1500ADC bin threshold trigger on DCRC4 pA (140mV external NaI trigger). 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 |
| | was cold trap bath ever filled? hope so. |