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Entry  Tue Apr 10 17:02:29 2012, Jenne, Update, IOO, Mode matching recollections and conclusions IMMT_positionSensitivity_plotted10Apr2012_LowRes.pngHistogram_20mmStDev_MMTmovesOnly_LowRes.pngHistogram_20mmStDev_MMTmovesAndTilts_LowRes.png
    Reply  Wed Apr 11 18:19:51 2012, Jenne, Update, IOO, Mode matching recollections and conclusions ModeMismatch_MMTpos_MMTang_MCw0_MCwz_change_LowRes.png
Message ID: 6522     Entry time: Wed Apr 11 18:19:51 2012     In reply to: 6516
Author: Jenne 
Type: Update 
Category: IOO 
Subject: Mode matching recollections and conclusions 

Another histogram.  This one allows the MMT mirror positions to move, the MMT incident angle for both curved optics to change, and the MC waist size and position to change.  The error quoted for the MC waist size measurement from 2010

was +\- 0.01mm, and the MC waist position was +\- 28mm.  

This histogram is showing that we're pretty sensitive to the MC waist measurement, which is used to define the beam.  We can be up to ~2% off in our ideal mode matching to the arms if we're using the incorrect initial beam for the telescope design.

ModeMismatch_MMTpos_MMTang_MCw0_MCwz_change_LowRes.png

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