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2012/08/24

0025 Start cryocleaning mixture through nitrogen cold trap 1. Fill N2 cold trap full.
0954 Fill LN2 cold trap full.
Fed Cricket 3 pellets
1140 Pump mixture into dump in preparation for cleaning cold traps.
1320 Extract cold traps from helium and nitrogen reservoirs. Start cleaning cold traps.
1455 Finished cleaning cold traps (3 cycles). Wait for them to cool down.
1532 Leak check. Leak rate: 3.6E-6 cc/s.
1625 Returned cold traps to proper positions. Filled LN2 cold trap. Begin cryocleaning.
1710 Begin LHe transfer (5.8%).
1738 Started 1K pot but accidentally left IVC open. Stop 1K pot. Continue evacuating IVC.
1800 End LHe transfer (91%).
1805 Fed Cricket 4 pellets.
1856 Start pumping on the 1 K pot with needle valve closed to get rid of LHe inside.
1859 Closed big speedivalve to stop pumping on th 1 K pot.