angus.bell@LIGO.ORG - posted 21:56, Monday 16 December 2013 - last comment - 15:37, Tuesday 17 December 2013(8979)
ETMY status
We finished welding ETMY on Friday evening. It was hanging with about 5 or 6 mrad of differential pitch wrt the PUM. It was left hanging over the weekend. When we looked at it this morning, two fibres had broken and the other two were lying against one of the earthquake stop rails. All the horns and stock were still intact. We scribed off the stock from all 8 horns and filed them back to 6mm above the ears. Work is ongoing to clean up the remains of the two shattered fibres and to pull enough fibres to allow welding again first thing in the New Year. Angus, Travis & Betsy
After cleaning, we stowed the lower sections of the QUAD in the welding cleanroom and covered them with C3 covers. 2 Genie lifts are now at EY for the TMS and SUS cartridge rearrangement. SEI and TMS are free to go start their work.
I would like Karen to do a floor cleaning of the test stand cleanroom as the floors are quite dirty. Also, the Genie that is not yet in the cleanroom needs a wipe down.
Note, I hand wiped the floor in the welding cleanroom and while I found dirt and some small metal particulate (from assembly of the cages around the suspension during welding), we did not find any "dead ringers" such as bugs or large objects which may have caused the fiber break.
I also carefully turned the C3 cover inside out and inspected for stray seams, fibers, particulate, etc. Other than bits of broken fibers, the cover was quite clean and secure looking.