2021/09/05 (Sunday)
- Lab in-personnel: Giulia and Zach
| Status | Run 74 in progress. First cooldown after IVC rebuild. |
|---|---|
| Tower thermometer is reading high, probably this is a thermometer problem and the actual temperature is much lower. High noise in some of the charge channels. | |
| Setup: DIB1/2+acc → SL 41/43 → 3.2 MHz filters → cables 2/3 → nothing/ |
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| Position of Am source: y = 0.0 mm | |
| 1131 | Tower/MC/Coldplate = 91.3/33.9/192.9 mK, Still = 1.38 K / 0.070 mbar / 0 mW, G1/G2= 284.1/263.3 mbar, 1K Pot = 1.56 K / 10±1 mbar. MB = 35.8%. |
| 1139 | Fill LN2 cold trap bath |
| 1034 | At 10kHz noise in DCRC3qI/qO/DCRC1qI/qO = 12/3.5/2.8/66 8e-6. This is q3/q1/q4/q2 At 3kHz (peak) noise in DCRC3qI/qO/DCRC1qI/qO = 240/34/27/400 e-6 |
| Noise is almost the same as yesterday. | |
| 1218 | Start 45 min series of 0V/-8V (bias applied after 60 sec), with 1000 beginning randoms, trigger threshold 50/40/30/250 on DCRC3qI/qO/DCRC1qI/qO, 5Hz in-run randoms, with 1.6384 ms pulses (8192 length) and 400 us prepulse (500 length). Start sequence with Start button. |
| It was still triggering after the bias was applied, thus I stopped it immediately and flashed it. | |
| 1220 | Dial HV down to 0V and flash detector for 10 minutes with DCRC1&3 LEDs. |
| 1309 | Start 45 min series of 0V/-8V (bias applied after 60 sec), with 1000 beginning randoms, trigger threshold 130/50/40/300 on DCRC3qI/qO/DCRC1qI/qO, 5Hz in-run randoms, with 1.6384 ms pulses (8192 length) and 400 us prepulse (500 length). Start sequence with Start button. |
| 1355 | Dial HV down to 0V and flash detector for 10 minutes with DCRC1&3 LEDs. |
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| 07210905_1309 |
| 1638 | Begin LHe transfer @ MB = 29.1 % |
|---|---|
| 1709 | End LHe transfer @ MB = 88.4 % |