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  Mon Sep 30 13:02:51 2013, Masayuki,Manasa, Update, IOO, PMC and MC alignment 
    Reply  Thu Oct 3 01:24:31 2013, Jenne, Rana, Update, IOO, PMC  PMCR_1064822387.bmppmc80.png
       Reply  Sun Oct 6 22:52:09 2013, Jenne, Rana, Update, IOO, input beam to PMC aligned again pmcr.png
          Reply  Mon Oct 14 17:51:40 2013, Jenne, Update, IOO, input beam to PMC drifted again 
             Reply  Mon Oct 21 13:15:52 2013, Koji, Update, IOO, PMC aligned 
             Reply  Fri Oct 25 10:45:16 2013, Steve, Update, PSL, laser drift monitor set up laserDriftMon.jpgPMCT_120d.pngPMCT_1000d.png
                Reply  Fri Oct 25 19:56:58 2013, rana, Update, PSL, laser drift monitor set up PMC-IRSISSS.pngPA250052.JPGPA280044.JPG
                Reply  Fri Jan 10 15:33:02 2014, Steve, Update, PSL, laser drift monitor set up idea 2daysDrift.png
                   Reply  Mon Jan 13 11:08:48 2014, Steve, Update, PSL, 3 good days of IOO pointing 3gdPSLpointing.png
                   Reply  Tue Jan 14 10:12:12 2014, Steve, Update, PSL, laser drift monitor set up idea bad4thday.png
Message ID: 9190     Entry time: Thu Oct 3 01:24:31 2013     In reply to: 9175     Reply to this: 9209
Author: Jenne, Rana 
Type: Update 
Category: IOO 
Subject: PMC  

The PMC transmission was around 0.78 all day, rather than the usual 0.83ish.  Rana went out to the PSL table and fixed up the PMC alignment.  This should not need to be done very often, so things to check before touching the alignment are FSS / PMC settings (digital stuff).  Make sure that the PC RMS (on the FSS screen) is low (at least below 2, preferably below 1), and that the FSS Fast monitor is near 5ish (not near 0 or 10).  

This is a capture of PMC REFL's camera after Rana was finished. If it doesn't look this good when you finish then you are not done. Never do PMC alignment without looking at the PMC REFL camera.

PMCR_1064822387.bmp

The attached trend shows 80 days of PMC REFL and TRANS. The bad alignment stuff started on Sep 21-24 time period. You know who you are.

Attachment 2: pmc80.png  23 kB  Uploaded Thu Oct 3 02:37:24 2013  | Hide | Hide all
pmc80.png
ELOG V3.1.3-