2022/05/13 (Friday)
- Lab in-personnel: Matt
| Status | Run 76 in progress |
|---|---|
| Setup | Cables 2/3/1 → diverter/nothing/nothing → Side2-readout HV CONN 1/3/2 → HV 1(L)/2(R) → DCRC50(3)/DCRC55(1), DCRC33(2)→HV control, NaI trigger signal → DCRCX(4) |
| 0815 | Check channels. Some periodic downward spike noise in DCRC1pA, pretty small… DCRC1pD railed, relocking it works. All DCRC3 channels railed… |
| 0820 | Zap SQUIDs on DCRCs1&3 |
| 0835 | Pulses look better after some relocks. Still seeing these little downward spikes though in some channels. And they are exactly 1 ms apart. So seems like interference from some clock or something. Neither the LED rep rate nor the test signal in either DCRC is set to 1 kHz. |
| As has been happening recently, MC temperature has bounced back up after falling from it's zap spike. Let's let it settle before taking data. | |
| 0850 | MC = 28.7 mK, still falling |
| 0853 | Start 0 V data series 51 min long, with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC3pD threshold 10. Start series with the Start Button. |
| 0925 | MC = 28.4 mK |
| 0945 | No longer seeing weird noise spikes in the channels |
| 0950 | Dial HV up to -3.76 V using RootSequencer |
| 0952 | Start -3.76 V data series 46 min long, with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC3pD threshold 10. Start series with the Start Button. |
| 0955 | MC = 28.3 mK |
| 1015 | HV has drifted steadily to -3.80 V |
| 1040 | Dial HV to 0V after data series ends |
| 1310 | MC/Coldplate = 28.2/146 mK, Still = 1.09 K / 0.100 mbar / 0 mW, G1/G2 = 125/124 mbar, 1K Pot = 18° / 1.56 K / 9±1 mbar, MB = 70.3% |
| 1310 | Goldman = 72.1 mK @ 632 uV excitation |
| 1315 | Fill LN2 cold trap bath |