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Reports until 16:20, Tuesday 01 November 2016
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gerardo.moreno@LIGO.ORG - posted 16:20, Tuesday 01 November 2016 - last comment - 10:04, Wednesday 02 November 2016(31089)
Degas of PT170 and PT180

(Patrick, Gerardo)

Degassed 2 nude ion gauges in the corner station, PT170 and PT180.  We did the degassing twice since the first time the degassing was terminated too early for both gauges, we sent second command before the 3 minutes were up, and it turns out that if you do send the command degassing stops.  As usual pressure went up to 10-07 torr for both gauges while degassing then, trended down after.

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gerardo.moreno@LIGO.ORG - 10:04, Wednesday 02 November 2016 (31127)VE

Trends for Inficon gauges PT170 and PT180 (BSC7 and BSC8) over 60 days, compared to the signal from PT120B (BSC2) using a MKS HPS 903 inverted magnetron cold cathode.

Note that PT120B trend has been shifted up to compare slope of signals, the other trends remain unchanged.

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