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
 List  |  Find  |  Login  |  Help 
Entry  Wed Aug 4 11:10:28 2010, nancy, Update, IOO, Mode Cleaner WFS 
    Reply  Wed Aug 4 12:49:42 2010, nancy, Update, IOO, Mode Cleaner WFS 6x
       Reply  Thu Aug 5 01:29:39 2010, nancy, Update, IOO, Mode Cleaner WFS 
          Reply  Thu Aug 5 11:48:52 2010, nancy, Update, IOO, Mode Cleaner WFS 
             Reply  Thu Aug 5 13:05:53 2010, Koji, Update, IOO, Mode Cleaner WFS 
                Reply  Fri Aug 6 10:44:55 2010, nancy, koji, Update, IOO, Mode Cleaner WFS 
                   Reply  Fri Aug 6 12:33:10 2010, Koji, Update, IOO, Mode Cleaner WFS 
                      Reply  Mon Aug 9 12:46:24 2010, Nancy, Update, IOO, Mode Cleaner WFS 
Message ID: 3358     Entry time: Wed Aug 4 12:49:42 2010     In reply to: 3357     Reply to this: 3365
Author: nancy 
Type: Update 
Category: IOO 
Subject: Mode Cleaner WFS 

Quote:

Yesterday, I started twiddling with the Mode Cleaner at about 2 pm.

So the seismic data should be all good before that.

I was using it till about 3.30 am, and then left for the night with locking it and swithcing on back the WFS control

Today morning, I have started twiddling with it again, at about 10.30 am.

 

About my work with the mode cleaner :

 

I am primarily exciting the mirrors in pitch and yaw, and trying to measure the response of the WFS and the MC2 OPLEV wrt the excitation.

This thus involves switching off the WFS control while measurement.

After two more of those measurements today, I will get to finding new values for the Output Matrix of the WFS for controlling MC1 & 3, and also, try giving in control to MC2 alignment using OPLEV signals.

 

 TFs after the measurement -

 In the order - MC1 , MC2 , MC3 -pitch and yaw.

These plots let us know about how do the wavefront sensor signals actually respond to the mis-alignments in the mirrors.

For legibility, legend has been includded in only one plot in each pdf., its typically the same for all  3 plots.

the actual xml files for this measurement are in the directory /cvs/cds/caltech/users/nancy/Align_Matrix/highpower/spot_center

It was made sure before each measurement that the MC is best aligned, the WFS are turned off, and the spots on all 3 QPDs are centered.

 

Attachment 1: pit.pdf  29 kB  | Hide | Hide all
pit.pdf
Attachment 2: yaw.pdf  29 kB  | Hide | Hide all
yaw.pdf
Attachment 3: pit.pdf  19 kB  | Hide | Hide all
pit.pdf
Attachment 4: yaw.pdf  19 kB  | Hide | Hide all
yaw.pdf
Attachment 5: pit.pdf  10 kB  | Hide | Hide all
pit.pdf
Attachment 6: yaw.pdf  43 kB  | Hide | Hide all
yaw.pdf
ELOG V3.1.3-