2021/09/06 (Monday)
- Lab in-personnel: Giulia
| 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/ |
|
| Position of Am source: y = 0.0 mm | |
| 1204 | Tower/MC/Coldplate = 89.9/33.7/193.1 mK, Still = 1.39 K / 0.070 mbar / 0 mW, G1/G2= 280.2/258.7 mbar, 1K Pot = 1.56 K / 10±1 mbar. MB = 67.4%. |
| 1212 | Fill LN2 cold trap bath |
| 0942 | At 10kHz noise in DCRC3qI/qO/DCRC1qI/qO = 8.2/3.2/2.7/51 8e-6. This is q3/q1/q4/q2 At 3kHz (peak) noise in DCRC3qI/qO/DCRC1qI/qO = 170/18/14/240 e-6 |
| Noise is lower than yesterday. | |
| 1240 | Start 45 min series of 0V/-8, 0/-10V (bias applied after 60 sec at -8V and then after 3 min increased to-10V), with 1000 beginning randoms, trigger threshold 70/40/35/200 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. |
| 1325 | Dial HV down to 0V and flash detector for 10 minutes with DCRC1&3 LEDs. |
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| 07210906_1240 |