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 Mar 23 00:31:51 2010, Koji, Update, IOO, MC realigned IMG_2346.jpgIMG_2347.jpg
    Reply  Tue Mar 23 09:37:36 2010, steve, Update, IOO, vac envelope has to be sealed as antproof for overnight pc3.JPGpc4.JPG
       Reply  Tue Mar 23 09:55:20 2010, Koji, Update, IOO, vac envelope has to be sealed as antproof for overnight 
          Reply  Wed Mar 24 02:06:24 2010, Koji, Update, IOO, vac envelope has to be sealed as antproof for overnight 
Message ID: 2698     Entry time: Tue Mar 23 00:31:51 2010     Reply to this: 2699
Author: Koji 
Type: Update 
Category: IOO 
Subject: MC realigned 

This is the first touch to the MC mirrors after the earthquake on 16th.

  • I made an aluminum access connector so that we can work on the MC even the door is open. We still can be able to open the aluminum tube. The photos are attached. Steve, could you please look it at a glance whether the seal is enough or not.
  • MC resonances were flashing. Align MC2 and MC3 so that we have many TEM00s.
  • Found c1vmesus2 gone mad. Restarted remotely according to the wiki entry. 
  • Reset the MC coil output matrix to 1. (Previously, balance was adjusted so that A2L was minimized.)
  • Excite MC2 Pitch/Yaw at 8 and 9 Hz, looking at the peaks in the MC-MCL output. Move MC2 Pitch/Yaw so that the peak
    is reduced. (*)
  • MC1/MC3 were aligned so that we get the maximum transmission (or minimum reflection). (**)
  • Repeat (*) and (**)

So far, I have aligned in Yaw such that the yaw peak is minimized.

Attachment 1: IMG_2346.jpg  62 kB  Uploaded Tue Mar 23 04:27:09 2010  | Hide | Hide all
IMG_2346.jpg
Attachment 2: IMG_2347.jpg  60 kB  Uploaded Tue Mar 23 04:27:28 2010  | Hide | Hide all
IMG_2347.jpg
ELOG V3.1.3-