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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: 2699     Entry time: Tue Mar 23 09:37:36 2010     In reply to: 2698     Reply to this: 2700
Author: steve 
Type: Update 
Category: IOO 
Subject: vac envelope has to be sealed as antproof for overnight 

Quote:

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.

 This seal is good for daily use- operation only. The IFO has to be sealed  with light metal doors every night so ants and other bugs can not find their way in.

Our janitor Kevin is mopping the hole IFO room floor area with 5%  ant killing solution in water in order to discourage bugs getting close to our openings of the vented chamber.

You may be sensitive to this chemical too.  Do not open chamber till after lunch.

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