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  Tue Feb 21 16:10:29 2012, kiwamu, Update, IOO, degradation in input PZT1 
    Reply  Mon Mar 5 03:50:49 2012, kiwamu, Update, IOO, PZT1 PITCH railing 
       Reply  Mon Mar 5 17:07:58 2012, kiwamu, Update, IOO, realigned MC 
          Reply  Thu Mar 8 23:37:03 2012, kiwamu, Update, IOO, dither Y arm dither script 
          Reply  Wed Mar 14 04:03:37 2012, kiwamu, Update, IOO, PZT1 and associate extra works 
Message ID: 6410     Entry time: Wed Mar 14 04:03:37 2012     In reply to: 6357
Author: kiwamu 
Type: Update 
Category: IOO 
Subject: PZT1 and associate extra works 

As the PZT1 has not been functional, I have been aligning the Y arm to the input beam instead of aligning the beam to the Y arm.

It turned out that this procedure leads to two extra works everytime after alignments of the Y arm:

  1. The Y green beam must be always aligned to the Y arm
    • The amount of the misalignment was found to be relatively big compared with how it used to be.
  2. The PSL beat note setup must be always realigned because the Y green path is determined by the orientation of the Y arm.
    • In the past I didn't often realign the beat note path, but currently it needs to be pay more attentions.

Sad ..

Quote from #6357

   The polarity for controlling the PZT1 PITCH seems to have flipped for some reason.

 

ELOG V3.1.3-