2021/07/29 (Thursday)

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.
1024	Tower/MC/Coldplate = 97.3/33.8/ 192.8 mK, Still = 1.40 K / 0.08 mbar / 0 mW, G1/G2= 275.2/251.8 mbar, 1K Pot = 1.61 K / 20±1 mbar. MB = 31.6%.
1132	Fill LN2 cold trap bath.
1404	At 10kHz noise in DCRC3qI/qO/DCRC1qI/qO = 13/2.5/2.3/51 e-6. This is q3/q1/q4/q2 At 3kHz (peak) noise in DCRC3qI/qO/DCRC1qI/qO = 575/61/55/1584 e-6
	These are similar to yesterday.
1431	Start 45 min series of 0V/-15V (bias applied after 60 sec), Tower @ 103 mK, with 1000 beginning randoms, trigger threshold 80/70/60/70 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.
1527	Dial bias down to 0V and flash detector for 600 seconds
1551	Begin LHe Transfer, MB = 22.3%.

07210729_1431