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2023/06/16 (Friday)

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  • Lab in-personnel: Ping
1206 Check contents of warm LN2 Trap 2: 4.9 mbar (5.4 on G1). Pump it out with the scroll pump.
1212 G1 = 1.5 mbar and stable, stop pumping on Trap 2
1213 Insert LN2 cold trap 2 and begin filling cold trap dewar with LN2
1222 Begin cryocleaning mixture through cold trap 2 following the procedure in procedure:cryoclean_mixture
1225 Open V6 to 12.0% to restart flow
1231 Open V6 to 12.2% to restart flow
1240 Open V6 to 12.3% to restart flow
1333 End cryocleaning mixture through trap 2. Pump mixture to dump
1358 P1 = 0.007 mbar, G1 = 2.0 mbar and stable. Close all valves and turn off 3He pump, leaving 713.8 mbar in dump
1401 Remove cold trap 2 from the LN2 bath to warm up overnight

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