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Entry  Thu Jan 22 23:36:50 2009, pete, HowTo, oplevs, arm cavity oplev calibration ETMYpitpower.pngETMYpitcal.png
    Reply  Fri Jan 23 12:48:12 2009, Kakeru, Update, oplevs, arm cavity oplev calibration ITMX_pitch.png
       Reply  Thu Jan 29 17:24:41 2009, Kakeru, Update, oplevs, arm cavity oplev calibration 
          Reply  Sat Mar 14 22:53:12 2009, Kakeru, Update, oplevs, arm cavity oplev calibration oplev.pdf
             Reply  Fri Mar 20 15:37:58 2009, Kakeru, Update, oplevs, arm cavity oplev calibration 
                Reply  Thu Mar 26 09:08:18 2009, Kakeru, Update, oplevs, arm cavity oplev calibration 
Message ID: 1259     Entry time: Thu Jan 29 17:24:41 2009     In reply to: 1249     Reply to this: 1403
Author: Kakeru 
Type: Update 
Category: oplevs 
Subject: arm cavity oplev calibration 
I calibrated optlevs again. My previous work has a lot of mistakes, so ignore it.

ITMX pit: 195 microrad/ct
ITMX yaw: 185 microrad/ct
ETMX pit: 303 microrad/ct
ETMX yaw: 296 microrad/ct

ITMY pit: 192 microrad/ct
ITMY yaw: 141 microrad/ct
ETMY pit: 294 microrad/ct
ETMY yaw: 301 microrad/ct

(For ITMY, the data is low quality)

My calcuration and Peter's(based on Royal's report) is different in two point.
i) Royal uses some geometrical factor to calibrate ITM.
ii) Royal fits data to exp(-a^2/(2*w0^2)), and I fit data to exp(-a^2/w0^2).

When I calculate with modification of these differences, my result became almost same value of Peter's one.
Now we are discussing which equation is correct.


But we must do some laser works before it...
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