40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
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Entry  Mon Oct 29 18:50:02 2012, Jenne, Update, Alignment, PRC aligned, Yarm almost aligned 
    Reply  Tue Oct 30 11:51:45 2012, Jenne, Update, Alignment, PRC aligned, Yarm almost aligned 
       Reply  Wed Oct 31 01:06:31 2012, Den, Update, Alignment, Yarm 
Message ID: 7643     Entry time: Wed Oct 31 01:06:31 2012     In reply to: 7642
Author: Den 
Type: Update 
Category: Alignment 
Subject: Yarm 

 

 Jenne, Den

We looked at beam spots on ITMY and ETMY. We switched to smaller apertures on the other side of the rulers. For ITMY beam spot was 1mm below and 1mm south (right if you look in the direction ITMY -> ETMY) from the aperture center, for ETMY - 4 mm up and 3mm north from the aperture center. We made a correction for this using PZT 1 and 2. Now beam spots are in the middle of the apertures on ITMY and ETMY.

We tried to look at reflected beam from ETMY but it was hard to see the dependence between ETMY DC offset and reflected beam. We'll continue tomorrow.

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