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2014/10/23

1130 With G2=620 mbar, close all valves on IGH and isolate fridge. Remove He and N2 coldtraps from dewars and begin pumping on them through He4 pump.
1235 Finish first round of cold trap cleaning. After rising to 623mbar at the beginning of the cleaning process, G2 since dropped to 615mbar.
1347 Finish second round of cold trap cleaning. G2 at 618 mbar.
1500 Finish last round of cold trap cleaning. G2 at 618 mbar.
1545 Stop pumping on cold traps, place them back in dewars and fill LN2 cold trap full.
Commence cryocleaning through cold trap 2.
1635 Raise dewar. Begin evacuating IVC.
1645 Interrupt cryocleaning. Commence pumping mixture to dump.
1650 Raise dewar.
1700 Open fridge lines.
1750 Isolate the main bath.