J. Oberling, R. Short

At the start of maintenance this morning, Jason and I touched up alignment into the PMC and RefCav remotely using the picomotor controlled-mirrors on-table. With the IMC and ISS off, we started with PMC alignment. Ultimately, we could only get maybe 0.1W of improvement in both transmitted and reflected power; see first screenshot with T-cursors for before and after power levels.

We then turned the ISS back on and moved on to RefCav alignment. Here we were able to get about 0.025V of improvement on the TPD signal, mostly in pitch; see second screenshot for before and after comparison.

Neither of these adjustments yielded the gains we were hoping for, and the camera spots certainly still show some apparent misalignments. This means we again may need to do some on-table alignment in the future, but for now, this should be passable.