john.worden@LIGO.ORG - posted 13:21, Tuesday 10 March 2015 (17175)
X1 Beam Tube Pressure during wash process.
The two plots show the vacuum gauges at either end of the X1 module for the past 100 days.
The features shown are due to large gate valve closures at the corner station. PT144 is next to the corner station while PT343 is at the Mid station.
Images attached to this report
