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Entry  Mon Apr 30 21:05:32 2012, Jenne, Update, SUS, ETMY oplev power supply dead 
    Reply  Mon Apr 30 21:24:43 2012, Koji, Update, SUS, ETMY oplev power supply dead 
       Reply  Mon Apr 30 22:41:34 2012, Jenne, Update, SUS, ETMY oplev power supply dead 
          Reply  Fri May 18 11:19:17 2012, steve, Update, SUS, ETMY oplev laser is dead 
             Reply  Tue May 22 08:03:01 2012, steve, Update, SUS, ETMY oplev gets new laser 
                Reply  Tue May 29 15:55:22 2012, steve, Update, SUS, ETMY oplev spot size reduced ETMYoplev.jpgIMG_1243.JPG
                   Reply  Tue May 29 21:34:08 2012, Jenne, Update, SUS, ETMY oplev spot size reduced 
                   Reply  Wed Jun 6 14:36:58 2012, steve, Update, SUS, ETMY oplev work finished 
                   Reply  Mon Oct 1 17:03:01 2012, steve, Update, SUS, ETMY oplev relayed IMG_1673oplevETMY.jpg
Message ID: 6710     Entry time: Tue May 29 21:34:08 2012     In reply to: 6706
Author: Jenne 
Type: Update 
Category: SUS 
Subject: ETMY oplev spot size reduced 

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 The typical sign of a dying gas laser is that it glows for a few minutes only. The power supplies are fine.

Two new  JDS - Uniphase 1103P lasers ( NT64-104 )  arriving on Monday, May 21

 Yesterday I swapped in new He/Ne laser with output power 3.5 mW  The return spot on qpd is large ~6mm in diameter and 20,500 counts

The spot size reduction require similar layout as ETMX oplev.

 The oplev path is relayed and the spot size on the qpd is reduced. I still have to clean up and replace "Miki Mouse" lens holder.

 Flipped the sign on the ETMY oplev servo gain, since it was wrong.  (It was "-" for both, now it is "+" for both)

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