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 Oct 9 17:16:14 2012, Den, Update, SUS, diagonalization mc123_rms.pdfmc1_diag.pdfmc123_rms.pdf
    Reply  Tue Oct 9 17:33:37 2012, jamie, Update, SUS, diagonalization 
Message ID: 7511     Entry time: Tue Oct 9 17:16:14 2012     Reply to this: 7512
Author: Den 
Type: Update 
Category: SUS 
Subject: diagonalization 

I went inside to align the beam on WFS and noticed that oscillations in yaw are ~10 times stronger then in pitch. I've plot rms of pitch and yaw measured by LID sensors and saw that MC3 yaw rms motion is a few times larger then pitch.

Also MC1 input diag matrix does not diagonalize signals for pitch and yaw. In the spectrums of these signals all 4 resonance are equally seen during the free swinging. I think we should rediagonalize MC1.

Another thing is that if MC1 and MC3 are on the same stack,  pitch and yaw spectrums of these mirrors should be comparable. But MC1 signal is ~2-3 times larger then of MC3. I think we should correct calibration.

Attachment 1: mc123_rms.pdf  12 kB  | Hide | Hide all
Attachment 2: mc1_diag.pdf  4 kB  | Hide | Hide all
Attachment 3: mc123_rms.pdf  12 kB  | Hide | Hide all
ELOG V3.1.3-