2016/04/22 (Friday)

1000	Disconnect ping pong ball and reconnect He Recovery hose in preparation for LN2 blowout.
1035	Commence LN2 blowout. Filling LN2 cold trap with blown out LN2.
	Background IVC leakrate 3.4E-8 mbarL/s.
1120	Cease LN2 blowout. IVC leak rate: 3.1E-8 mbarL/s. Turn on He3 pump to attempt throughput test.
1125	Throughput of 56mbar/min. Looking good. Pump to dump.
1135	Isolate fridge lines. And begin closing V6 to isolate mixture in the dump.
1138	Pump out Main Bath. Pump out 1K Pot.
1152	Flush the Main Bath with He gas.
1405	After trying to pull out the LN2 transfer stick for like two hours, we finally were able to pull it out. Re-flush the Main Bath with He gas since presumably a lot of it escaped since the seal wasn't maintained during the transfer stick pulling.
1414	Current mixing chamber temperature at 82 K. Commence LHe transfer (-1%). Add 4.6E-2 mbar He exchange gas to IVC. Commence cryocleaning through cold trap 2.
1508	After rising to ~85.5K, temperature has begun falling. Currently at 84.3K.
1542	MC Temp: 72K. LHe transfer tube needs a new O-Ring at the linkage. You can see that it's freezing up and even occasionally dripping LHe as seen below:

LHe Transfer Tube Frozen

1600	MC Temp: 62.4K.
1630	MC Temp: 48.4K. LHe level: 21.6%.
1650	MC Temp: 38.7K. LHe level: 40.0%. Cease cryocleaning. Pump mixture back to dump.
1715	Isolate mixture in dump. G2 reads 790mbar mixture.
1725	Pump out lines leading up to Cold Trap 2 from P2. Isolate scroll pump to and remove Cold Trap 2 from LN2 bath and allow to warm up while connected to P2.
	MC Temp: 18.8K. LHe level: 70.4%.
1745	Cease LHe transfer (92.6%).
	MC Temp: 13.9K.
1800	MC Temp: 12.6K. Open turbopump to lines leading up to IVC, then open IVC to pump out exchange gas over the weekend.
1805	P2 still only reads 2.2mbar and cold trap 2 is almost at room temperature. Not going to bother pumping it out now. Wait until Monday.