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2014/08/18

1055 Helium had depleted, causing G1 and G2 to rise. Commence pumping to dump. Turn off 1 K Pot.
1100 Fill LN2 cold trap full.
1120 Commence LHe transfer (-1.0%).
1230 End LHe transfer (91.2%).
Turn on 1K Pot, using the He4 rotary pump.
1400 Stop pumping on 1K pot.
1440 Commence cold trap cleaning.
1715 Commence cryocleaning. Restart 1K Pot.
1745 Finish cryocleaning. Pump mixture to dump.
1815 Current pressures: G1: 0.2mbar, G2: 630.0mbar, P1: 15ubar. Commence condensation with 500mbar of mixture. Target G2 pressure of 130mbar.
1900 130mbar of mixture left in dump. Close valve 9. Open V12A completely. G1: 54mbar, G2: 61mbar and stable. 1K pot at 1.694K, mixing chamber at 1.89K. Commence circulation.
1917 P1: .2mbar, Mixing chamber temperature of 585mK and dropping.
1918 Mixing chamber rising after hitting low of ~580mK. G1: 82.4mbar, G2: 105.6mbar.
1922 After reaching high of >830mK, mixing chamber temperature begins decreasing again.
1955 Mixing chamber now at 197.4mK with very slow downward trend. G1: 100.4mbar, G2: 116.4mbar.