Reports until 17:33, Tuesday 02 January 2018
LHO VE
kyle.ryan@LIGO.ORG - posted 17:33, Tuesday 02 January 2018 (39953)
Miscellaneous vacuum recovery
Valved-in HAM1 500 L/s ion pump and pumped in parallel with Turbo for a few hours -> Isolated turbo and eventually shut down turbo after IP demonstrated ability to survive unassisted.  

Energized IP1, IP2 and IP3 while assisted by pump carts -> Isolated and then shut down pump carts after IP's demonstrated ability to survive unassisted.  

Valved-in GV5 AIP pump cart -> annulus volume at high pressure due to YBM vent and known inner O-ring leak -> Energized GV5 AIP controller and will pump volume with IP and pump cart overnight.  

Still need to climb on IMC and OMC tomorrow to disconnect connected pump cart hardware.