2021/07/30 (Friday)
- Lab in-personnel: Giulia
| Status | Run 74 in progress. First cooldown aftr 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/Source_mover_board+HV_diverter_board → DCRC50(3)/55(1). Kepco 40V supplye → HV BNC. No lead/poly shield. Currently both DCRCs are on. | |
| 1008 | Tower/MC/Coldplate = 111.2/33.7/ 193.5 mK, Still = 1.42 K / 0.075 mbar / 0 mW, G1/G2= 277.6/247.2 mbar, 1K Pot = 1.61 K / 20±1 mbar. MB = 70.1%. |
| 1021 | Fill LN2 cold trap bath. |
| 1200 | Problem with /data/cdms1, which is where we store raw data - currently the computers can't mount this disk. We are able to start MIDAS and view pulses, but we will not be able to write data until this is fixed. |
| 1245 | At 10kHz noise in DCRC3qI/qO/DCRC1qI/qO = 12/1.6/2.3/36 e-6. This is q3/q1/q4/q2 At 3kHz (peak) noise in DCRC3qI/qO/DCRC1qI/qO = 380/39/38/940 e-6 |
| These are all better than yesterday. 3kHz oscillations are still pretty significant though. |