| 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 both DCRCs are on. |
| | Position of Am source: y = 0.00 mm |
| 0958 | Tower/MC/Coldplate = 210/36/ 191.3 mK, Still = 1.37 K / 0.08 mbar / 0 mW, G1/G2= 269.2/258.3 mbar, 1K Pot = 1.59 K / 20±1 mbar. MB = 72.1%. |
| 1010 | Fill LN2 cold bath. |
| 1017 | At 10kHz noise in DCRC3qI/qO/DCRC1qI/qO = 26/3.8/3.8/67 8e-6. This is q3/q1/q4/q2
At 3kHz (peak) noise in DCRC3qI/qO/DCRC1qI/qO = 860/44/63/1200e-6 |
| | Noise is considerably worse than yesterday. |
| 1036 | Start 45 min series of 0V/-9V (bias applied after 60 sec), with 1000 beginning randoms, trigger threshold 150/45/70/300 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. |
| 1125 | Dial bias down to 0V and flash detector for 10 minutes with DCRC1&3 LEDs. |
