Travis S. Gary T. Matt H. Greg G. Final (hopefully!) alignment of the in-vacuum optics for TCS was completed today. ITMx had already had an alignment done by Thomas Vo and myself last month, but Travis and I made sure things were well centered on SM1 in BSC3. A range of motion test showed no clipping throughout the compensation plate for ITMx. For ITMy I was aided by Gary and Matt. ITMy was an initial alignment and took a little more finagling. The periscope on the table had to be adjusted a bit, and some small adjustment to SM1 was done; but otherwise alignment went smoother than I expected. The beam is traveling a little high through the outside viewport optic on BSC1 but is well centered on the inner optic. The range of motion test showed there to be clipping on the Y arm elliptical baffle towards the upper range of motion. Matt noticed irregularities on the surface of the mirrors and will hopefully be able to post pictures later.
Hard to describe exactly what look like, but think of if had a drop of water in middle of mirror and then blow with a blast of air directly in the centre and everything went out in lines from the centre to the edge.
See pics for my sketch and pics
This is reminiscent of what you saw at LLO in aLOG 8680.
https://alog.ligo-la.caltech.edu/aLOG/uploads/8680_20130911144133_DSCF4196.jpg