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Reports until 10:51, Thursday 02 July 2026
LHO VE (VE)
gerardo.moreno@LIGO.ORG - posted 10:51, Thursday 02 July 2026 (90868)
BSC2 Dome Installation

(Randy, Jordan, Travis, Jake, Owen, Gerardo)
Late entry, activities took place yestereday.  Installation was a bit harder than anticipated.

Stuck walking plate
We removed a couple of the walking plates, then when trying to remove the third plate, it got stuck, the plate was wedged between 3 hard places and the chamber, we used a pry bar to get it unstuck and out of there.

Bad Inner O-ring
We inspected both of the BSC O-rings, outer and inner, the outer O-ring is in good condition, however the inner O-ring was not, it had chaffing/scuffing on several locations and of large lengths along the sealing surface, and since it was not going to seal we decided to remove it.  When removing the O-ring, it left strings of O-ring behind on the sealing surface, and after completely removing the O-ring it was time for elbow grease (only compatible vacuum grease) and lab q-tips to the rescue that Jordan found, with IPA and lots of rubbing and a Travis hack, we manage to clear the debris left behind.  A new O-ring was installed without issues and it stayed put to set the dome on.

Dome installation
The easy part, setting the dome on top of the chamber went on with no issues, currently the dome has a total of 6 bolts, we will get back to it as soon as we can.

 

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