robert.schofield@LIGO.ORG - posted 16:11, Tuesday 25 October 2016 - last comment - 16:29, Tuesday 25 October 2016(30867)
Main beam port could use first contact
We checked the cleanliness of the double paned port between the PSL and HAM1. The photo shows a smudge on the outside surface that extends into the center of the port. We think that a cleaning would help. There is dust on the inner pane, but I think the smudge on the outside is the most dangerous.
Robert, Cheryl, Gerardo
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Here's my picture showing a film-like contamination circle littered with what looks like particulate.
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