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2018/01/05 (Friday)

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Status: warming up. All mixture in dump, fridge isolated. LN2 trap pumped out to dump. 1K Pot needle valve open.
1140 MC(Cernox)/Sorb = 28/46.6 K. At about 11:00, when the MC reached 22 K and the Sorb reached about 40 K, both began to rise more quickly.
1140 G1 has been rising overnight, currently 93 mbar. This is an isolated IGH volume. But I forgot to close the Trap 2 speedivalve. This is probably Trap 2 air leaking through V12b.
1145 Open V12b to view Trap 2 contents at G1. Trap 2 = 239 mbar of contaminant gas. Pump this out with scroll pump.
1205 MC(Cernox)/Sorb = 30.5/50.5 K.
1205 Open V1 to view LHe Trap contents at G1 (Condenser and Still valves are closed). LHe Trap = 69 mbar of contaminant gas. Pump this out with scroll pump.
1215 Open V12a+speedi to view Trap 1 contents at G1. Trap 1 = 5 mbar of contaminant gas. Pump this out with scroll pump.
1250 MC(Cernox)/Sorb = 34.3/50.5 K.
1630 MC(Cernox)/Sorb = 46.7/84.6 K.
1645 Check fridge pressures: condenser at G1, still at P1. Nothing detectable on condenser side. On still side P1 rose from 0.45 to 1.1 mbar, so a little in there.

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