Reports until 08:45, Tuesday 06 February 2018
LHO VE
chandra.romel@LIGO.ORG - posted 08:45, Tuesday 06 February 2018 - last comment - 15:50, Tuesday 06 February 2018(40430)
GV 5,7 open

Opened GV 5,7 for commissioners x arm work. Opened up GV 5 to utilize cryopump #1. Pressure at beam splitter is currently 1.14e-7 Torr. Pressures just past CP 1,2 are 6.64e-8 Torr and 7.75e-8 Torr, respectively.

Recorded another RGA scan just before opening valves, after the filament was turned on overnight (thanks Jeff K.!). Will scan again later today.

(This RGA computer in control room is not functioning properly. An upgrade is in its future.)

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chandra.romel@LIGO.ORG - 08:50, Tuesday 06 February 2018 (40432)

Note the high N2 peak.

chandra.romel@LIGO.ORG - 15:50, Tuesday 06 February 2018 (40437)

Here's an RGA scan at 3:30pm with corner exposed to arms (X1,X2,Y1). Carlos had to wipe the RGA computer today and unfortunately we lost all the stored ASCII data from previous RGA scans. Many should be in aLog but since the default ASCII file that exports from Quadera doesn't upload into aLOG, it sometimes didn't get uploaded (such as this morning's scan). Scan plots are always uploaded as PDF, jpeg, or similar.

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