2021/07/13 (Tuesday)
- Lab in-personnel: Pramod,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/Source_mover_board+HV_diverter_board → DCRC50(3)/55(1). Kepco 40V supplye → HV BNC. No lead/poly shield. Currently DCRC55(1) is disconnected and off, Cable 3 plugged into source mover board only. | |
| 0954 | Tower/MC/Coldplate = 155/34.5/185 mK, Still = 1.29 K / 0.075 mbar / 0 mW, G1/G2= 286.9/262.6 mbar, 1K Pot = 1.63 K / 20±1 mbar. MB = 33.3% |
| 1002 | Fill LN2 cold trap bath. |
| 1145 | Get MIDAS working again. There have been some IT changes that made things not work… currently we can start MIDAS (on cdms1) but we can only see the webpage from a browser run on cdms1, not on other computers in the cluster. |
| 1145 | At 10kHz noise in DCRC3qI/qO/DCRC1qI/qO = 23/3.7/2.5/47 e-6. This is q3/q1/q4/q2 At 3kHz (peak) noise in DCRC3qI/qO/DCRC1qI/qO = 1400/150/110/2300 e-6 |
| 3kHz noise is strong again. One possibility - it's pretty humid today, and the LN2 E-box purge may have been off overnight. Turned the purge on just now at a pretty high rate. | |
| 1203 | Start 84 min series of 0V/-15V (bias applied after 200 sec, bias removed after 66 min), with 1000 beginning randoms, trigger threshold 150/60/30/300 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. |
| 1343 | Begin LHe transfer @ MB = 28.2% |
| 1414 | End LHe transfer @ MB = 90.1% |