janos.csizmazia@LIGO.ORG - posted 16:54, Thursday 25 July 2024 - last comment - 16:03, Friday 26 July 2024(79318)
7-25 vent vacuum diary
Today's activities: - The purge air dew point was measured at the purge port: (9:15 am) -43.9 deg C, so it is consistently dropping in time. Some more specifics here: https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=79306 - HAM6 -X door has been removed. The O-rings seem to be intact - The opportunity was taken for replacing the HAM6 RGA. It will be also re-wrapped with heat tapes, and after the chamber work ends, will be baked out. - Pressures: the arms' pressures slowly dropping (probably because of the weather is getting colder). The Y-manifold pressure is stabilized around 2-3E-8 Torr.
HAM6 RGA was swapped with a brand new Pfieffer PrismaPro RGA. We had not been able to connect to the old RGA since ~March 24, through the network nor locally using a laptop. The new unit has been installed and is currently prepped for bakeout once chamber work has finished.