chandra.romel@LIGO.ORG - posted 15:19, Friday 01 June 2018 - last comment - 16:44, Friday 01 June 2018(42288)
IP3 installed; IP2 being pumped
[Mark, Tyler, Chandra]
Mark and Tyler installed IP3 this morning. It is leak tight (with 7.2e-10 mbar-L/s background). It is currently being pumped with aux cart + hung turbo. It can't maintain itself yet. Voltage gets to 2000 V (84 mA) before tripping off. Will valve it out from aux cart over weekend and resume pumping on Monday.
IP2 is slowly recovering (re-installed this old pump that had vented with room air). It gets up to 4400 V before tripping. Will also valve out over weekend.
Tried one more time to energize IP2,3. IP2 came up to 5000 V and IP3 up to 5200 V before tripping off. I valved out both aux carts for the weekend.