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2012/08/25

0030 Fill N2 cold trap full.
1410 Fill LN2 cold trap.
Fed Cricket 4 pellets
1420 Isolate IVC. Start 1K pot. Switch yellow valve to recovery.
1620 Pump mixture into dump: 698 mbar in dump. Open up lines to fridge. Start condensing mixture through nitrogen cold trap 1 with automated procedure.
1850 Stop condensing mixture at mixing chamber temperature of 2.84 K. Start automated circulation procedure.
2250 Stop automated circulation procedure. Mixing chamber temperature 94.6 mK. Mixing chamber is still cooling, but the rate has slowed down significantly for the last couple of hours. Still thermometer reads 4.4 kΩ, implying that it is a little warm and hence may be dry, although still pressure is relatively high at 0.13 mbar. G1 & G2 pressures are 56 mbar & 68 mbar respectively. Cold plate thermometer resistance is 13.5 kΩ, again a little warm at approximately 180 mK.
Reduce temperature of 1 K pot from 1.7 K to 1.5 K.
2320 Mixing chamber temperature has increased to 96.3 mK, and seems to be heading in an upward direction, albeit very slowly. It may be a good idea to increase 1 K pot temperature back to 1.7 K.
Leave everything as it is for now and take a look at the situation in the morning. We can make a decision then as to the next course of action.
2340 Fed Cricket 4 pellets.