2021/08/14 (Saturday)

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
1649	Tower/MC/Coldplate = 117.5/35.5/ 188.2 mK, Still = 1.32 K / 0.075 mbar / 0 mW, G1/G2= 281.1/252.6 mbar, 1K Pot = 1.58 K / 20±1 mbar. MB = 26.3%.
1700	Fill LN2 cold bath.
1708	At 10kHz noise in DCRC3qI/qO/DCRC1qI/qO = 26/3.2/2.2/39 8e-6. This is q3/q1/q4/q2 At 3kHz (peak) noise in DCRC3qI/qO/DCRC1qI/qO = 600/35/34/690e-6
	Noise is slightly lower than yesterday.
1658	Begin LHe transfer @ MB = 26.3%
1731	End LHe transfer @ MB = 91.1%
1805	Noticed in the data that in muons, there doesn't seem to be time synchronization between the DCRCs. Looked at the ODB and saw that DCRC1 was set to “Master”, should be set to “Slave”. Oops. We've probably had this problem for a while.
	MIDAS RUN42384 was the first series where it was set incorrectly (most recent written series was RUN42485). This was 26 July 14:31. So, all data series between then and now have unsynced DCRCs.