chandra.romel@LIGO.ORG - posted 17:47, Monday 14 May 2018 - last comment - 17:56, Monday 14 May 2018(41980)
CP4 pressure
CP4 pressure on 450 l/s turbo pump is 2.5e-9 Torr. Will take RGA scans tomorrow. Bake enclosure will be removed tomorrow.
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Attached is an SEM analog scan (in red) from LLO's cold, isolated CP4 (pumped with small 55 or 75 l/s IP) at their EX in comparison with the preliminary scan (in black) Kyle took last week of LHO's baked CP4 pumped by 450 l/s turbo. Note that LLO's scan is from an SRS model and LHO's is from a Pfeiffer Prisma Plus model so the Torr to amp ratios are different.
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