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2014/10/20

1030 Fill LN2 cold trap full.
1145 Commence pump to dump.
1436 Closed condenser line speedivalve and gate valve.
1500 Pump and flush main bath, commence IVC leak check with background leak rate of 1.2E-9 mbar*L/s. No leak found.
1614 Add 1.2 mbar He exchange gas into IVC.
1620 Commence LN2 transfer.
1800 Nitrogen dewar has run dry. Cease nitrogen transfer and attach ping-pong ball. Probably enough nitrogen in main bath, so no need to refill dewar. Mixing chamber temperature 134 K and falling.
2235 Mixing chamber temperature 77.4 K. Start pumping He-4 exchange gas out of IVC.