2023/01/24 (Tuesday)

Status	Run 77 preparation
Setup	DCRC33(2)→HV control, NaI trigger signal → DCRCX(4)
	IVC closed and Turbo pumping for a while. No tower - this was just for a leak test.
1045	Check contents of warm LN2 Trap 1: 8.9 mbar. Pump it out with the scroll pump.
1053	G1 = 2.1 mbar and stable, stop pumping on trap 1.
1055	Check contents of warm LN2 Trap 2: 3.0 mbar. Pump it out with the scroll pump.
1100	G1 = 1.7 mbar and stable, stop pumping on trap 2.
1102	Insert cold trap 1 into the LN2 bath, fill with LN2.
1107	Begin cryocleaning mixture through cold trap 1.
1112	Open V6 to 12.2% to start flow
1126	Open V6 to 12.5% to restart flow, then go back down to 12.2% so that the flow is not too large.
1221	Open V6 to 12.6% to restart flow
1300	Open V6 to 12.7% to restart flow, then go back down to 12.5% so that the flow is not too large
1305	Stop cryocleaning through LN2 trap 1, pump mixture to dump.
1315	G1 = 1.3 mbar and stable, close all valves, leaving 717.1 mbar in the dump
	Barometric pressure = 30.06“ (source is https://w1.weather.gov/data/obhistory/KMSP.html.) G2 = 717.1 mbar. Corrected dump pressure = 721.8 mbar

Ptrue[mbar] = Pdisplay[mbar] + ( Pbar[inHg] - 29.92 ) * 33.86

1338	Turn of 3He pump, pull cold trap 1 out of the LN2 bath.
1415	Place cold trap 2 into the LN2 bath, turn on the 3He pump
1420	Begin cryocleaning through cold trap 2
1423	Open V6 to 12.4% to start flow
1432	Open V6 to 12.6% to restart flow, then go back down to 12.5% so that the flow is not too large.
1455	Open V6 to 12.7% to restart flow, then go back down to 12.4% so that the flow is not too large.
1410	Started Tower Installation.
1545	Completed installaing shields for the 100mK Can. Attach Outer first, then inner shield piece. We use medium-sized screws for the heatsinks outer screw-holes, longer screws for inner screwholes of heatsinks and short screws for other screwholes to complete the 100mK shield.
1547	Attached 600mK rod.
1635	Stop cryocleaning through LN2 trap 2, pump mixture to dump.
1655	G1 = 1.5 mbar and stable, close all valves, leaving 723.4 mbar in the dump
1702	Stop 3He pump and pull cold trap 2 out of the LN2 bath
1715	After plugging Squet ZC-31 into the tower we saw squid D open and feedback A open, after investigating it seems to be the interposer board was not tight enough
	The interposer board does not have a perfectly flush connection, so it can connect to the squet at different angles depending on how you push it, changing the angle seemed to sometimes fix the connection issue but it is fragile

	Throughput test procedure is written in this /cdms/k100/run_diary/20220318