chandra.romel@LIGO.ORG - posted 10:26, Monday 05 February 2018 - last comment - 08:46, Tuesday 06 February 2018(40410)
valved in corner IPs & RGA; valved out MTPs
Valved in vertex RGA and all six main ion pumps and valved out all three main turbo pumps (all pumps reading ~1 mA). Tomorrow will open GV 5,7 for x-arm commissioning (8am-8pm local).
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RGA scan with IPs valved in and MTPs valved out. Also attached scan pre-vent for comparison.
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How long had the filament been energized before taking today's scan?
< 90 min. Jeff K. turned filament on for me via phone instructions. Will scan again tomorrow morning before opening up to beam tube.
Here is a scan after the IPs were pumping over night and turbos valved out, and RGA filament turned on for > 12 hrs.
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