2023/03/14 (Tuesday)

* Lab in-personnel: Himangshu

	Turbopumping IVC and cryostat vacuum jacket overnight (for more leak checks). Mixture in dump.
1436	Turn on leak detecter to warm up
1450	Turbo on cryostat vacuum jacket (CVJ) and IVC = 46 nbar. With Turbo valved out for a minute cryostat vacuum jacket (CVJ) and IVC = 0.86 ubar (8.6e-4 mbar).
1503	Close CVJ valve to only pump on the IVC for leak check
1520	Turbo on IVC = 30 nbar. With Turbo valved out for a minute IVC = 0.34 ubar.
1532	Start leak detector with turbo still pumping, LD on IVC = 3.75 pbarL/s (3.75e-9 mbarL/s) with IVC = 30 nbar.
1543	Leak detector on IVC = 38 pbarL/s (3.8e-8 mbarL/s). Squirt some helium at stripline elbow: no change
1553	Turn on 3He pump. Let mixture into fridge through V14, V3, V1, manually turn open Still Gate valve and open Condenser Speedivalve. No change in leak signal.
1555	Pump mixture back to dump. Open V9 and then open V6 to 13% at first, wait for fridge pressure to start to fall. Then close V14 and open V6 to ~30%.
1630	Finish pumping mixture to dump. After P1< 0.1 mbar, close fridge valves (manually close Still Gate valve and close Condenser Speedivalve, close V1, V3). Close V6 (set V6 to 0, wait for light to go off), then close V9 (record the pressure in G2) and turn off 3He pump. G2 = 704.9 mbar
1650	Keep turbo pumping on the CVJ for overnight