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2015/01/26

0850 With G1=2 mbar, P1=1000 mbar and G2=11 mbar, close V2 and V1 and open V3 to allow He gas from still line into G1. G1 stabilizes to 665 mbar.
0900 Add He gas until G1 reads 998 mbar. Close V3 and pump on G1 lines until G1=1 mbar. Conduct throughput test by opening V1; throughput test gives a rate of 16 mbar/min.
0910 Close V1 and open V3 to see that G1 stabilizes to 988 mbar. Close V3 and open V2 to pump out G1 until G1<1 mbar. Conduct throughput test again; throughput test gives a rate of 16 mbar/min again. Commence pumping on fridge lines with scroll pump.
0940 Switch to turbo pump.
1415 Closed gate and condenser line speedivalve. Raised the Dewar.
1500 Pump and flush main bath. Commence LN2 transfer. Recommence pumping on fridge lines with turbopump.
1647 Closed gate valve and condenser line speedivalve. Isolated turbo pump.
1701 Completed LN2 transfer. Temperature of Dewar is currently 87.4 K.
1717 Commence pumping on IVC with scroll pump. Mixing chamber temperature currently at 82 K.
1830 Switch to evacuate IVC with turbo pump.
1850 Mixing chamber temperature 80.6 K.