| | 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 |
| 1220 | Most recent data series is bad, all DIB 2 channels gone |
| 1220 | dialed voltage down to 0V |
| 1225 | found out that all the data after 4/29 at 1900 has DIB 2 channels gone, this means essentially 17 out of 21 hours of data is garbage, very mad about that, how can I stop it from happening? This run probably can't tolerate such inefficiency |
| 1226 | ground the detector at the voltage source |
| 1229 | begin a 1 hr bake |
| 1350 | begin prebias at 65V |
| 1358 | dialed to 50V after prebias period |
| 1401 | took the voltage across TP1 and TP2, after a long period of settling (in which it monotonically increased from negative to positive) it “settled” around 5-7 mV, according to the formula this makes the voltage somewhere between 46.9 and 47.8V, but the measurement never becomes what I'd call stable, it varies in that 5-7 mV range |
| 1412 | got all the channels back on the SQUID tuning GUI, wait for the temperature to come back to base before starting run |
| 1425 | 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 |
| 1428 | data looks good in BatViewer |
| 1539 | Fill LN2 cold trap full. |
| 1539 | Tower/MC/Coldplate = 32.8/30.6/188 mK, Still = 1.2 K / 0.110 mbar, G1/G2 = 232/220 mbar, 1K Pot = 1.692 K / 28 mbar. Main Bath = 57.5%. Boil off rate: faster than slow mode (predicted level: 61.8%) |