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Entry  Fri Mar 8 16:02:52 2013, Jenne, Update, Alignment, Getting closer to beam centering on Yarm YARMdecenter_zoom_8Mar2013.png
    Reply  Tue Mar 12 00:58:05 2013, Manasa, Update, Alignment, Yarm - Spot positions centered 
Message ID: 8260     Entry time: Fri Mar 8 16:02:52 2013     Reply to this: 8276
Author: Jenne 
Type: Update 
Category: Alignment 
Subject: Getting closer to beam centering on Yarm 

I'm working on getting the input beam centered on the Yarm optics.  To do this, I measured the spot positions, move the tip tilts, realign the cavity, then measure the new spot positions.  While doing this, I am also moving the BS and Xarm optics to keep the Xarm aligned, so that I don't have to do hard beam-finding later.

Here is the plot of spot measurements today.  The last measurement was taken with no moving, or realigning, just several hours later after speaking with our Indian visitors.  I'm closer than I was, but there is more work to do.


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