We are discussing venting first thing next week, with the goal of
diagnosing what's going on in the PRC.
Reminder of the overall vent plan:
https://wiki-40m.ligo.caltech.edu/vent
Since we won't be prepared for tip-tilt installation (item 2), we should
focus most of the effort on diagnosing what's going on in the PRC. Of
the other planned activities:
(1) dichroic mirror replacement for PR3 and SR3
Given that we'll be working on the PRC, we might consider going ahead
with this replacement, especially if the folding mirror becomes
suspect for whatever reason. In any case we should have the new
mirrors ready to install, which means we should get the phase map
measurements asap.
(3) black glass beam dumps:
Install as time and manpower permits. We need to make sure all needed
components are baked and ready to install.
(4) OSEM mount screws:
Delay until next vent.
(5) new periscope plate:
Delay until next vent.
(6) cavity scattering measurement setup
Delay until next vent. |