Reports until 19:44, Sunday 21 June 2015
H1 INS
kaitlin.gushwa@LIGO.ORG - posted 19:44, Sunday 21 June 2015 - last comment - 20:17, Tuesday 23 June 2015(19263)
OMC Black Glass Shroud - update

Calum & Kate

Finished unwrapping and inspecting all 26 panels of black glass. 100% of the parts made it in one piece and all of the coatings look good. This is great news! The panels are dusty, smudgy, and streaky; and will need to be cleaned (this was expected). The plan is to use a methanol rinse followed by drag wipping. 24/26 pieces of glass were rinsed 2x, so we're about halfway through the cleaning effort. Currently using 3 large cleanroom tables, but we'll need at least one more for prep work.

Two points of note for LLO:

1) The following parts were packaged between 2 sheets of float glass:

D1500054-101 & 102

D1500055-101 & 102

It was a good idea to protect the oddly shaped parts, but care should be taken when opening them because a couple pieces of the float (packaging) glass had chips and cracks and these were spread around the wrapping. Again these did their job and protected the black glass (which was in good shape) just a heads up.

2)  Some of the parts are double packed in the bubble wrap. Again caution when opening.

Comments related to this report
gary.traylor@LIGO.ORG - 20:17, Tuesday 23 June 2015 (19301)
All of the black glass at LLO was unwrapped today and laid out on a flow bench in the optics lab for inspection. Upon initial inspection for damage, there were no obvious chips or dings in any of the glass. The odd shaped pieces were in great shape with no abnormalities around the edges due to being sandwiched between glass for packing (the float glass was even flawless). Tomorrow we will check the coatings and begin the cleaning process. I will leave it to the inspection crew to record tomorrow but there were a few minor spot flaws in the coating on about 3 pieces.