2018/07/30 (Monday)

	status: warming to room temperature over weekend. Pumping continuously on IVC. Helium in cryostat vacuum jacket.
	On Friday the main bath was pumped out and backfilled with N2. So it should still be pretty much dry nitrogen.
1205	Turbo on IVC = 6.3 nbar. MC(Cernox) = 293 K
1210	IVC = 100 nbar (with turbo valved out)
1215	Leak detector on IVC, background 13.6 pbarL/s, lots better than on Friday. (This is with turbo valved out.)

	Leak checking inside of MB
1220	Short blast He into top of MB, leak signal steady @ 13.4 pbarL/s.
1222	Another short blast into transfer stick lifted 1 inch, steady @ 13.6 pbarL/s.
1224	Push transfer stick back down, another short blast, steady at 13.7 pbarL/s. Looks like indium seals are ok.
1226	Blast near strip line tube connection, steady @ 14.2 pbarL/s.
1229	Blast near KF flange o-ring, steady at 14.4 pbarL/s.
1232	On April 16, the background level was lower and the leak signal read 10 pbarL/s. So maybe we aren't quite sensitive enough to see this leak now (?)
1239	Pumped out He cold trap with scroll pump, pressure V1 = 7.4 mbar.
1240	Pumping out fridge lines with scroll pump.
1244	Check pressure in LN2 warm trap 1, 244 mbar pumped out with scroll pump. Continue to pump out with scroll pump.
1248	Check pressure in LN2 warm trap 2, 6.0 mbar pumped out with scroll pump.
1400	Leak checker background has decreased while hooked up to the turbo pump, steady at 1.6 pbarL/s. Turbo on IVC = 10 nbar.
1450	Stop pumping out LN2 traps. Stop turbo on IVC. Background leak on IVC = 18 pbarL/s
1515	Let mixture in from pump to both sides of fridge lines through trap 2, background leak steady at 17 pbarL/s.
1516	Pump mixture back to dump.
1525	5 sec blast into bath from the top, steady @ 16 pbarL/s, continue to blast gas around top of fridge, slow increase but mostly steady from 18-19 pbarL/s.

1526	Closed IVC valves so only pumping on the fridge lines, immediate decrease to about 2 pbarL/s.
1538	Isolated IVC, began pumping on vacuum jacket with scroll pump. (Prior to pumping, vacuum jacket pressure was 1 mbar).
1546	Waited for vacuum jacket pressure to decrease, then switched from scroll pump to turbo pump, turning off scroll pump.
1548	Close V9, turn off He3 pump.