gerardo.moreno@LIGO.ORG - posted 18:06, Monday 27 July 2026 - last comment - 18:31, Thursday 06 August 2026(91270)
BSC6 Annulus Ion Pump Work
(Jordan, Travis, Gerardo)
We removed and replaced the AIP for BSC6, no real complications while doing the work. However the joint at the AIP and the isolation valve has a tiny gap towards the bottom, we started pumping down on the system and it appears to be a solid union, we will go and visit tomorrow and see how the pressure is doing. On a side note we did find a flex metal hose that has a leak, it has been removed from circulation.
After checking on the pumpdown progress at BSC6 annulus system, the rest of the components were put back, controller was reinstalled, cables were connected (power supply, high voltage, and comms cable) and the annulus ion pump was powered on, it did not take long to reach good vacuum pressure. Aux-cart and can turbo will continue to pump the annulus sytem until it reaches an acceptable vacuum pressure.
(Travis S., Jordan V., Gerardo M.)
Late entry.
After a few days of pumping down the annulus system, on Monday 8/3/26, the can turbo and the aux-cart were removed from the annulus system at BSC6, the ion pump and annulus system are back to nominal.