This is a late report about the work done in HAM6 on Thursday. Basically we have aligned things in HAM6, so that we should be able to work on locking the OPO for now.
In the morning Nico, TJ and Terry pulled off the viewport simulator, and Gerardo and TJ removed the septum window protector so that we could attempt to inject a beam into HAM5.
TJ and Terry recentered the osems on ZM1, which seems to have improved the performance of the damping loops (TJ is planning to remeasure the damping loops, but our experience in chamber was that it was not swinging around as badly once this was done).
We reentered the green rejected beam on the DCPD and its reflection onto the black glass dump, which was lost when TJ and Daniel fixed the short in the diode.
We also added the black glass clip to the last steering mirror before ZM1. This means that we should be finished making adjustments that might change the balancing of the OPO suspension.
Nutsinee and I borrowed the Thorlabs PZT driver from the optics lab so that we can scan the OPO PZTs more quickly which makes alignment into the OPO much easier. Nutsinee had installed a thorlabs PDA100A into the homodyne path so that we could look at the OPO transmitted power. We found that we were not well enough aligned through the apertures on HAM6 so that the flashes we saw on SQZT6 would sometimes be clipped on one of the apperature as the OPO suspension and ZM1 were swinging. Once we had the beam better aligned through the apertures, we can see the cavity scan for 1064 fairly well.
We decided that it wasn't worth trying to inject this beam into HAM5 and look for it returning to HAM6, since the power was so low it is hard to see the beam while scanning.
We had a hard time finding the green transmitted beam from the OPO, but with help we were able to turn off the cleanroom +LVEA lights. This allowed us to find the beam and align onto the green TRANS PD. With the OPO suspension locked we were able to align the green into the OPO decently. We then unlocked the OPO suspension.