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I completely agree with Koji. We definitely should have locked the half PRC first. We were all set up for that.
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I reminded Jamie this morning that we were not, in fact, set up yesterday for a half PRC. I had extracted what was the flat test mirror, to put in as PR2. The test mirror was the better of the 2 G&Hs that we had measurements for, so I had used it as the flat test mirror, but then also wanted it to be the more permanent PR2. After doing the PR2 flip, the IFO was naturally all aligned for PRMI, which is part of why we just did that.
Anyhow, Jamie used his tallness to put the other measured G&H mirror into the mount, and put that in front of the BS. He aligned things such that he saw fringes in the half PRC.
I then aligned POP onto the camera, and onto the PD. Yuta is confirming that we're maximally on the REFL PDs.
We're starting locking in 5 min. |