2021/11/29 (Monday)

Status	Beginning Run 75.
	1K Pot isolated. MB raised. Cryostat vacuum jacket (CVJ) pumped out.
1005	Check contents of warm LN2 Trap 1: 6.4 mbar. Pump out with Scroll Pump. While pumping pressure falls by 5.7 mbar.
1005	Check contents of warm LN2 Trap 2 (which was pumped out 5 days ago): 2.3 mbar. Pump out with Scroll Pump. While pumping pressure falls by 0.9 mbar. interestingly Trap 2 doesn't seem to pump down as low as Trap 1, as seen on both G1 and P2.
1040	Start cryocleaning mixture through LN2 Cold Trap 2, V6 = 12.4%
1045	Increase V6 → 12.6% to restart flow
1105	Increase V6 → 12.7% to restart flow
1115	Increase V6 → 12.8% to speed up flow
1130	Increase V6 → 12.9% to speed up flow
1140	Stop cleaning through Trap 2 after 60 min. G2 flow pressure was 575-825 mbar. Pump mixture to dump. Removed 6.5(5.4) mbar.
1205	Start cryocleaning mixture through LN2 Cold Trap 1, V6 = 12.8%
1220	Increase V6 → 12.9% to restart flow
1245	Increase V6 → 13.0% to speed up flow
1315	Stop cleaning through Trap 1 after 70 min. G2 flow pressure was 590-730 mbar. Pump mixture to dump. Removed 8.5(7.8) mbar.
1420	Lower MB into pit far enough to install fill funnel on fridge. Raise MB again.
1605	Check contents of warm LN2 Trap 2: 6.5 mbar. Pump out with Scroll Pump. While pumping pressure falls by 5.4 mbar.
1615	Check contents of warm LN2 Trap 1: 8.5 mbar. Pump out with Scroll Pump. While pumping pressure falls by 7.8 mbar.
1615	Turn off 3He pump.