Reports until 17:16, Wednesday 28 February 2024
LHO VE
janos.csizmazia@LIGO.ORG - posted 17:16, Wednesday 28 February 2024 (76039)
2-28 vent vacuum diary
Today's activities:
- HAM8 was roughed down, currently the turbo is pumping. It is at ~9E-6
- HAM7 pumpdown status: ~5.1E-7 Torr
- GV2 was opened, so the preserved vacuum ballast in the X-manifold pulled the corner's pressure further down
- Corner pumpdown: ~3E-7 Torr, ~195 hours after the HV pumping started
- Corner (and HAM7) further schedule: Ion pumps (IP1, IP2, IP3, IP4, IP14, IP19) valve-in: 2-29; Valve together the corner, HAM7, relay tube, X manifold (open RV1): 2-29; Turbo pump valve-out: 3-1; RGA scan #2: 3-4; GV5 & GV7 open: 3-4
- EX pumpdown status: 2.3E-8 Torr.
- EX further schedule: RGA scan #1: 2-29; Ion pump valve-in: 2-29; Turbo pump valve-out: 3-1; RGA scan #2: 3-4; GV20 open: 3-4
- The HAM6 RGA has connection and/or hardware issues; its ion-pump was found switched off, which could cause issues with the filaments
- The MX Hepta header filter has been finally added, see pictures attached
Images attached to this report