Reports until 15:18, Friday 07 August 2026
LHO VE (VE)
jordan.vanosky@LIGO.ORG - posted 15:18, Friday 07 August 2026 (91451)
Opening Cryotraps and Ion Pumps to Corner Volume

Per WP 13497

I opened IP1/2/3/4 to the corner volume at 18:38 UTC / 11:38 PDT

GV8 Soft closed  at 20:47 UTC / 13:47 PDT

GV7 opened at 21:20 UTC / 14:20 PDT

GV5 opened at 21:48 UTC / 14:48 PDT

Both GV5 & GV7 opened between 45-50 psi, and the holding pressure is set to 55 psi.

GV6 and GV8 will remain soft closed to isolate the beamtubes. CP1 and CP2 are now open to the corner volume to assist with the water pumping, water is still the dominant gas after ~22 days of pumping, see corner RGA scans in alog 91446

Corner pressure is decreasing as expected.

Images attached to this report