| | 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) |
| 1244 | Fill LN2 cold trap. |
| 1244 | Tower/MC/Coldplate = 32.9/30.6/194 mK, Still = 1.3 K / 0.110 mbar, G1/G2 = 230/216 mbar, 1K Pot = 1.686 K / 26 mbar. Main Bath = 30.3%. Boil off rate: close to slow mode (predicted level: 31.5%) |
| 1249 | Dial HV down to 0V. Start 30 minute bake on DCRCs 1&2. |
| 1310 | Start LHe transfer (MB = 29.7%) |
| 1403 | Looked at last night's data, DCRC2pC and pD railed shortly after first series began. |
| 1555 | End LHe transfer (MB = 92.1%) |
| 1556 | Set HV=65V After 5 mins, reduce to 50V. |
| 1508 | HV=50.03 V, V_test=1.6mV → V_det=49.3 V |
| 1511 | Start 20 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 |