| 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. |
| 1051 | Tower/MC/Coldplate = 195/36.3/171 mK, Still = 1.39 K / 0.08 mbar / 0 mW, G1/G2= 295.9/271.5 mbar, 1K Pot = 1.62 K / 20±1 mbar. MB = 65% |
| 1059 | Fill LN2 cold trap bath. |
| 1710 | At 10kHz noise in DCRC3qI/qO/DCRC1qI/qO = 11/2.3/1.6/11 e-6. This is q3/q1/q4/q2
At 3kHz (peak) noise in DCRC3qI/qO/DCRC1qI/qO = 905/75/48/715 e-6 |
| | These are all lower than yesterday. Maybe because we have the E-box purge going? Yesterday morning it was off. |
| 1734 | Start 45 min series of 0V/-15V (bias applied after 2.5 min), with 1000 beginning randoms, trigger threshold 90/50/35/90 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. |
