40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log  Not logged in ELOG logo
Entry  Fri Sep 21 20:48:24 2012, Jenne, Update, General, POP in-vac optics aligned, POY beam coming out of vac 
    Reply  Fri Sep 21 22:25:44 2012, Mike J., Update, General, POX, POY, PR2 pics 10x
    Reply  Mon Sep 24 23:45:39 2012, rana, Update, General, POP in-vac optics aligned, POY beam coming out of vac 
       Reply  Tue Sep 25 14:29:07 2012, Jenne, Update, General, POP in-vac optics aligned, POY beam coming out of vac 
Message ID: 7437     Entry time: Tue Sep 25 14:29:07 2012     In reply to: 7436
Author: Jenne 
Type: Update 
Category: General 
Subject: POP in-vac optics aligned, POY beam coming out of vac 

Quote:

  What was the reasoning / resolution of the POP forward/backward beam? Are we going to have the right beam for DRMI locking?

From Koji's email to me:

"With the backward beam you can see the returning beam even when the PRM is misaligned. That's the only difference. Once the PRM is aligned both beams have the same information."

So, we should be fine.

ELOG V3.1.3-