Reports until 13:43, Thursday 01 February 2018
LHO VE
chandra.romel@LIGO.ORG - posted 13:43, Thursday 01 February 2018 (40365)
IP4 test before and after vent

Kyle, Chandra

IP4 arrived from vendor after being fully rebuilt, baked, and shipped under vacuum. We connected it to a aux cart to pump out from found ~e-4 Torr to e-6 Torr and then applied 7 kV to both channels. Then vented with dry N2, pumped out and applied 7 kV to find that the current is a factor of ten higher than first test. This may be normal because of the exposure to gas, but LLO doesn't show the same results, and it reads higher than the other pumps in operation.

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