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2015/02/12

1000 Currently mixing chamber temperature at 14.9 K and external pressure sensor reading 7.4E-3 mbar (this might not be accurate?). Turn on leak checker.
1030 Switch to leak checker. Background leak rate of 8.3E-8 mbarL/s.
1050 Start 1K Pot. Current 1K Pot temperature is 1.7 K. Current mixing chamber temperature is 15 K.
1432 Stop pumping out condenser and still lines (P1=85 ubar) with scroll pump. Pump out gas line, and then restart 1K Pot. Fill LN2 cold trap full. Add He gas through cold trap 1 to G1 in short burts, with V1, V3 and fridge lines open to aid in cooling.
1510 Mixing chamber has already reached a temperature of 1.7 K, similar to the temperature of the 1K Pot. Start leak checker. When opened to the IVC, leak checker read a value of 8.5E-10 mbarL/s. This is due to the cryopumping, but it is a good sign that no superfluid leak is present. Isolate leak checker.
1745 P1 pressure 36 mbar and G1 pressure 11 mbar. He-4 has condensed. Add a little more.