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2014/01/28

0010 Cease helium transfer. Helium liquid level 52.0%.
0025 Fill N2 cold trap full. Commence cryocleaning mixture through nitrogen cold trap 2.
0250 Mixing chamber temperature drops below 8 K. Commence evacuation of IVC to extract He-4 exchange gas.
1045 Fill LN2 coldtraps full. Confirm that mixture is still cyrocleaning (there is still flow).
1115 Begin LHe transfer (9.8%).
1220 Finish LHe transfer (94.1%).
1415 Finish cryocleaning. Pump mixture to dump.
1430 Isolate IVC at pressure of 1.4E-6 mbar. Isolate dump at 660 mbar.
1445 Start 1K Pot.
1505 1K Pot reached temperature of 1.78K and pressure of 180 mbar.
Filled LN2 cold trap full.
1520 Commence manual condensation procedure through Cold Trap 1.
1540 350 mbar added to fridge for condensation. 310 mbar left in dump.
1700 Commence circulation procedure with fridge temperature at <3 K.
1745 Finish manual circulation procedure. Fridge temperature at 295mK and dropping. 1K Pot temperature at 1.775K. G1 at 93mbar, P1 at .19mbar, G2 at 95mbar, P2 at 130mbar.
2330 Mixing chamber temperature 62.1 mK. Reduce 1 K pot temperature to 1.65 K; stays relatively stable - hopefully situation will improve overnight. Best not to keep playing with the needle valve. Mixing chamber temperature has dropped to 60.0 mK. Leave overnight to witness any improvements.
2335 Fill N2 cold trap full.