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2014/04/27

0510 Cease evacuating cold traps. Place nitrogen cold traps in their bath and fill N2 cold trap full. Commence cryocleaning mixture through nitrogen cold trap 2.
Insert helium cold trap into main bath. Commence helium transfer. Helium liquid level 0%.
0545 Cease helium transfer. Helium liquid level 59.0%.
1045 Interrupt cryocleaning and pump mixture into dump in preparation for condensation procedure.
1130 Fill N2 cold trap full.
1155 Start 1 K pot, temperature 1.81 K. Open gate valve and condenser line speedivalve. Dump pressure 673 mbar. Mixing chamber temperature 6.5 K. Commence manual condensation procedure through nitrogen cold trap 1.
1220 Feed 350 mbar dump pressure of mixture into fridge (323 mbar left in dump).
Valve V12A fully open: manual condensation procedure complete. Mixing chamber temperature 5.8 K.
1435 Mixing chamber temperature 2.8 K. Commence manual circulation procedure.
2045 Valve V6 fully open: manual circulation procedure complete. Lower temperature of 1 K pot to 1.62 K. Mixing chamber temperature 65.5 mK. Leave overnight.
Fill N2 cold trap full.