D. Cook, J. Oberling
ETMx
We moved the recently tweaked oplev laser (SN 197) from our testbed at HAM3 to ETMx. This laser will thermally stabilize over the course of the afternoon, then we will start monitoring it to perform, if necessary, the final tweaks. While we were at End X we installed the 50 lb. lead damper assembly onto the ETMx receiver pylon. Due to the laser swap and the damper install, the oplev needed to be realigned, so we did that as well.
PR3
At the request of commissioners we realigned the PR3 optical lever. While out there, we installed the light pipe support assembly (see attached picture) to keep the light pipe on the receiver from sagging.
great! that will make life easier.
ETMy
We also finished tweaking another laser and considering the ongoing HAM6 work, and with commissioner approval, installed that in ETMy (SN 138-2). We also installed the lead damper (see attached picture) and realigned the oplev (like ETMx, the laser swap and the damper installation changed the alignment of the oplev). We will monitor this one as well as ETMx to see if we need to make any small tweaks to the laser power to maintain stability.
