Reports until 18:40, Sunday 08 February 2026
LHO VE (VE)
gerardo.moreno@LIGO.ORG - posted 18:40, Sunday 08 February 2026 (89078)
HAM3 Annulus Ion Pump Replacement

(Jordan V., Gerardo M.)

-Late entry

On Friday we removed and replaced the ion pump for HAM3.  We replaced the copper gasket twice, the first gasket seal had a bad leak, it was hard to see the mating surfaces due to visibility issues (laser safety goggles and not enough light).
After installing a second gasket, we started pumping down the annulus system and pressure went down fast.  Last pressure reading at the aux-cart was 4.63x10^-05 Torr.
BTW, we have other 4 (four) ion pumps to replace.

Images attached to this report