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2014/01/30

1355 Filled LN2 coldtrap full.
1545 Performed single shot test. Tower thermometer reached a minimum temperature of ~51 mK during test.
1550 Commence pumping mixture to dump. Turn off 1K Pot.
1650 Commence He transfer. Helium level at 23.0%.
1740 End LHe transfer (94.9%.)
2000 Mixing chamber temperature >6 K. Dump pressure has remained at 669 mbar for the last couple of hours, so most of the mixture has been recovered. Turn off mixing chamber heater, stop recovering mixture and start 1 K pot (temperature 1.82 K).
Fill N2 cold trap full. Commence manual condensation procedure through nitrogen cold trap 1.
2030 Valve V12A fully open: manual condensation procedure complete. Dump pressure approximately 319 mbar (350 mbar dump pressure of mixture in fridge). Mixing chamber temperature 5.1 K.
2245 Mixing chamber temperature 2.6 K. Commence manual circulation procedure.
2350 Valve V6 fully open. Cease manual circulation procedure.