Terry, Thomas Vo, Sheila

We set the dark offsets on the OMC QPDs, which now give us reasonable signals with the sewed beam from the OPO on them.  We weren't able to close the OMC ASC loops around the QPDs, although we siwtched the sign on the OM3 actuation as described in 41436.  

I manually aligned OM3 and the OMC suspension with the AS centering loops on to roughly zero the error points of the OMC QPD loops. (screenshot attached).  Then we were able to scan the OMC.  The scanning time was from 1:03 to 1:06:25 UTC April 14th.

We also made a quick attempt to lock the OMC, but it is a very noisy lock.  It might not be possible to lock the OMC on the seed beam with the purge air all the way up like this.  We need to have the door cover partly open to lock the OPO, so we didn't try turning down the purge air.