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Entry  Wed Dec 7 21:18:35 2016, Koji, General, General, OMC placed on the table / the beam roughly aligned DSC_0082.jpgDSC_0084.jpg
    Reply  Thu Dec 8 21:17:09 2016, Koji, General, General, OMC placed on the table / the beam roughly aligned 
Message ID: 272     Entry time: Wed Dec 7 21:18:35 2016     Reply to this: 273
Author: Koji 
Type: General 
Category: General 
Subject: OMC placed on the table / the beam roughly aligned 

The OMC mode matching sled was fixed on the nominal part of the table. Then the OMC was located at the nominal position marked by three poles.

The input periscope was adjusted to have the input beam roughtly centered on the OMC QPDs. This made the beam from FM2 aligned to the missing CM1, and the beam just went through the hole of the mounting prism. Very promising!

I wanted to use the new (modified) mirror gluing fixture to hold a curved mirror on the mounting prism. It turned out that the fixture was neither cleaned nor assembled. I will ask Downs Team to help me to get the cleaned and assembled fixtures.

Meanwhile, I just reused the original gluing fixture upside down in order to proceed cavity alignment and locking. (Attachment 1)
In fact, once the mirror is placed on the mounting prism, the cavity started to flash without further alignment. I thank for the very precise (repeatable) alignment of the OMC optics and PD/QPDs.

The next steps are initial cavity locking, more alignment, and mode matching.

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Attachment 2: DSC_0084.jpg  2.284 MB  | Hide | Hide all
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