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Editor: TomotadaAkutsu
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[[KAGRA/Commissioning/CommissioningWorkshop2017|Back to CommissioningWorkshop2017]]
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 * Current IMC servo topology:
  * https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=7105
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* Measured IMC length: 53.3 m
http://klog.icrr.u-tokyo.ac.jp/osl/?r=616
(Could be slightly different right now since we had re-installation work after this measurement)		  * Common mode servo board configuration:
  * SLOW ('''K1:IMC-SERVO_SLOW_CON_IN1''') goes to AOM (and IMC length)
  * http://klog.icrr.u-tokyo.ac.jp/osl/?r=3190
  * http://klog.icrr.u-tokyo.ac.jp/osl/?r=3544
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* Measured IMC mode matching ratio: 86.2 %
https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=5019
(Could be fairly different right now since we had re-installation work after this measurement)		  * IMC sideband frequency: 13.78 MHz
  * https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=5493
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* Measured MCe RoC: 37.33(9) m
http://klog.icrr.u-tokyo.ac.jp/osl/?r=711		  * Measured IMC modulation depth: ~0.1 rad
  * http://klog.icrr.u-tokyo.ac.jp/osl/?r=3709
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* Measured AOM actuation efficiency: 5.064(7) MHz/V
http://klog.icrr.u-tokyo.ac.jp/osl/?r=3172		  * Measured IMC finesse: 540 +/- 70 (NOTE: 458 from cavity pole, not klogged)
  * http://klog.icrr.u-tokyo.ac.jp/osl/?r=618
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* Measured MCe actuation efficiency: 6.9 um/V
(any data for MCi and MCo?)
http://gwclio.icrr.u-tokyo.ac.jp/lcgtsubgroup/inoutoptics/2015/06/mce625-26.html#comments		  * Measured IMC round-trip length: 53.3 m (Could be slightly different right now since we had re-installation work after this measurement)
  * http://klog.icrr.u-tokyo.ac.jp/osl/?r=616
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*  * Measured IMC mode matching ratio: 86.2 % (Could be fairly worse right now since we had re-installation work after this measurement)
  * https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=5019
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* Calibrated IMC WFS noise level, and some noise hunting:
http://klog.icrr.u-tokyo.ac.jp/osl/?r=3366
http://klog.icrr.u-tokyo.ac.jp/osl/?r=3335		  * Measured MCe RoC: 37.33(9) m
  * http://klog.icrr.u-tokyo.ac.jp/osl/?r=711
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* Accelerometer on the PSL table:
http://klog.icrr.u-tokyo.ac.jp/osl/?r=3373
http://klog.icrr.u-tokyo.ac.jp/osl/?r=3435
http://klog.icrr.u-tokyo.ac.jp/osl/?r=3689		  * Measured AOM actuation efficiency: 5.064(7) MHz/V (x2 for double-pass)
  * http://klog.icrr.u-tokyo.ac.jp/osl/?r=3172
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* IMC length NoiseBudget code:
(UPDATE SVN)		  * Measured laser PZT actuation efficiency: 1.48 MHz/V (NOTE: 1.26 MHz/V using AOM, not klogged)
  * http://klog.icrr.u-tokyo.ac.jp/osl/?r=2853

 * Laser temperature actuation efficiency: not measured yet

 * Measured mirror actuation efficiency: 17.2 MHz/V(MCe), 15.9 MHz/V(MCi), 14.9 MHz/V(MCo) @DC (could be wrong; inconsistent between measurements)
  * http://klog.icrr.u-tokyo.ac.jp/osl/?r=2985
  * http://gwclio.icrr.u-tokyo.ac.jp/lcgtsubgroup/inoutoptics/2015/06/mce625-26.html#comments
  * MCe pendulum frequency: 0.955 Hz

 * Measured IMC optical gain: 18.6 V/MHz (cavity pole=5.6kHz) (NOT UP TO DATE; we changed laser power, detection optics since then)
  * http://klog.icrr.u-tokyo.ac.jp/osl/?r=2979

 * Reference cavity parameters: finesse 1.1e4, length 10 cm (spec), cavity pole 68 kHz

 * Counts to volts, volts to counts:
  * ADC: 2^16/40 counts/V
  * DAC: 20/2^16 V/counts

 * IMC oplev calibration:
  * http://klog.icrr.u-tokyo.ac.jp/osl/?r=3175

 * Calibrated IMC WFS noise level, and some noise hunting:
  * http://klog.icrr.u-tokyo.ac.jp/osl/?r=3366
  * http://klog.icrr.u-tokyo.ac.jp/osl/?r=3335

 * Accelerometer on the PSL table:
  * http://klog.icrr.u-tokyo.ac.jp/osl/?r=3373
  * http://klog.icrr.u-tokyo.ac.jp/osl/?r=3435
  * http://klog.icrr.u-tokyo.ac.jp/osl/?r=3689

 * IMC length NoiseBudget code:
  * https://granite.phys.s.u-tokyo.ac.jp/svn/LCGT/trunk/kagranoisebudget/FSS/IOO.slx
  * https://granite.phys.s.u-tokyo.ac.jp/svn/LCGT/trunk/kagranoisebudget/FSS/IOO_params.mat
  * https://granite.phys.s.u-tokyo.ac.jp/svn/LCGT/trunk/kagranoisebudget/FSS/mnNb_Lib.slx

 * Frequency stabilization servo modeling (design):
  * https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=3330
  * https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=2908

 * Roughly measured beam profiles for Gouy telescope
  * http://klog.icrr.u-tokyo.ac.jp/osl/?r=3156

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IMC Information

KAGRA/Commissioning/CommissioningWorkshop2017/IMCInfo (last edited 2017-11-28 19:23:27 by TomotadaAkutsu)