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2011/11/18

1056 Tower T=82mK. P1=0.065. No significant change observed disconnecting the dewar lifting cable. Add 6mW to still.
1057 P1=0.15mbar. Tower T rose to 82.3mK.
1159 Tower T=88.7mK. P1=0.15mbar. There is a strong coupling between the still and the tower. Turn off still heater.
1435 Unplug the two DCRC's. This triggered a temperature spike up to 116mK.
1820 Pump mixture out in preparation for cleaning the cold traps. Turn on mixing chamber heater, power = 20 μW. Turn off 1 K pot.
2210 Pumping out the mixture is a little slow: so far 180 mbar has been recovered. Increase mixing chamber heater power to 20 mW.
2235 Fill N2 cold trap full.