2022/04/19 (Tuesday)
- Lab in-personnel: Matt
| Status | Run 76 in progress |
|---|---|
| Setup | Cables 2/3/1 → diverter/nothing/nothing → Side2-readout HV CONN 1/3/2, DCRC33(2)→HV control, NaI trigger signal → DCRC52(6) |
| Yesterday I realized I'd been making a mistake plugging the cables into the HV boxes. I'll try again with the Side2-readout card. As on April 15 we'll try DCRC50(3)/DCRC55(1) → HV2/HV1. | |
| I wound up adjusting several phonon settings when the cables were plugged in wrong. Let's go back to the 2-sided settings from April 8 | |
| 1000 | Set DCRC1&3 phonon parameters in ODB corresponding to April 8 settings. |
| 1000 | MC/Coldplate = 26.2/140 mK, Still = 1.04 K / 0.100 mbar / 0 mW, G1/G2= 120/108 mbar, 1K Pot = 18° / 1.58 K / 11±1 mbar |
| 1110 | Fill LN2 cold trap bath |
| 1115 | Attach DCRCs, HV 1(L)/2(R) → DCRC50(3)/DCRC55(1). Power DCRCs and start DAQ programs. No temperature spike, just a small increase. |
| 1125 | Got pulses in several channels, except DCRC3pA are upside-down and distorted and DCRC1pB can't be unrailed. Let's zap SQUIDs. |
| 1125 | Zap SQUIDs in DCRCs 1&3 |
| 1135 | Pulses in all 6 channels now, although some require rather severe offsets, so DCRCs may be in a bad state. MC has risen from 26.3 to 29.3 and looks like it's peaking. |
| 1145 | Use Root Sequencer to increase HV to 12.2 V. Pulses still present - good! Vtest = 2.6 mV… implies Ileak=2.9 nA, Vcrystal = 11.1 V. Good. |
| 1150 | Use Root Sequencer to increase HV to 34.1 V. Pulses still present. After a few minutes Vtest falls to 5.9 mV, → Ileak=6.5 nA, Vcrystal = 31.5 V. |
| 1505 | Retune SQUID on DCRC3pA (ugly pulses, look much better after retuning) |
| 1515 | Do mini-IbIs on DCRC3pA, MC = 28.6 mK. QET bias 188.1/199.8 → dP/dI=0.7/1.0 uV |
| 1530 | Do mini-IbIs on DCRC3pB, MC = 28.6 mK. QET bias 182.1/193.6 → dP/dI=0.7/1.0 uV |
| 1540 | Do mini-IbIs on DCRC3pD, MC = 28.5 mK. QET bias 198.8/210.7 → dP/dI=0.7/1.0 uV |
| 1600 | Do mini-IbIs on DCRC1pA, MC = 28.6 mK. QET bias 174.5/178.8 → dP/dI=0.7/1.0 uV |
| 1615 | Retune SQUID on DCRC1pB |
| 1630 | Do mini-IbIs on DCRC1pB, MC = 28.5 mK. QET bias 182.1/189.5 → dP/dI=0.7/1.0 uV |
| 1640 | Do mini-IbIs on DCRC1pD, MC = 28.5 mK. QET bias 229.6/236.7 → dP/dI=0.7/1.0 uV |