Mechanical shutter for PSL green is installed right in front of PSL doubling crystal.
This is for blocking PSL green when we want to measure the power of green beam from the arms.
The shutter was previously sitting on AS table un-used. Channel name to control this shutter was C1:AUX-SPS_Shutter. This should be renamed as C1:AUX-GREEN_PSL_Shutter.
We are going to restore both arm green in parallel to PRMI work.
- Coarsely align IR input pointing and arms using A2L
- Align X green
- Install green DC PDs and cameras on PSL table