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Entry  Wed Mar 20 14:44:47 2013, Jamie, Update, Optics, updated calculations of PRC/SRC g-factors and ARM mode matching 
    Reply  Mon Mar 25 16:51:59 2013, Jenne, Update, Optics, updated calculations of PRC/SRC g-factors and ARM mode matching 
    Reply  Tue Mar 26 11:33:55 2013, Jamie, Update, Optics, HOWTO calculate effective RoC of flipped TT mirror.mtransmission.mTTflipped.mM2Reff.m
Message ID: 8339     Entry time: Mon Mar 25 16:51:59 2013     In reply to: 8316
Author: Jenne 
Type: Update 
Category: Optics 
Subject: updated calculations of PRC/SRC g-factors and ARM mode matching 

I think we like the idea of flipping SR2 better than SR3 for the same ghost beam reasons as PR2 is better than PR3.  There isn't very much free space in the BS chamber, and if we flip PR/SR3, we have to deal with green ghosts as well as IR.

The flipping SR2 case seems okay to me - flipping either one of the SR folding mirrors gives us a slightly better g-factor than the design with infinite curvatures, and flipping SR2 gives us slightly better mode matching to the arm than the flipped SR3 case, but more importantly, there are fewer ghosts to deal with.  I vote we flip SR2, not SR3.

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