Differences between revisions 7 and 22 (spanning 15 versions)
⇤ ← Revision 7 as of 2017-11-27 22:08:49 →
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← Revision 22 as of 2017-11-28 19:23:27 → ⇥
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Editor: TomotadaAkutsu
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[[KAGRA/Commissioning/CommissioningWorkshop2017|Back to CommissioningWorkshop2017]]
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  * slow path to AOM???   * 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 modulation depth: ~0.1 rad (measured??)  * Measured IMC modulation depth: ~0.1 rad
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 * Measured IMC finesse: 540 +/- 70  * Measured IMC finesse: 540 +/- 70 (NOTE: 458 from cavity pole, not klogged)
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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)		  * 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 %
  * 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)		  * 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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 * Measured AOM actuation efficiency: 5.064(7) MHz/V  * Measured AOM actuation efficiency: 5.064(7) MHz/V (x2 for double-pass)
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 * Measured actuation efficiency: 17.2 MHz/V(MCe), 15.9 MHz/V(MCi), 14.9 MHz/V(MCo) @DC  * 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)
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  * MCe pendulum frequency: 0.955 Hz
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 * Measured IMC optical gain: 18.6 V/MHz (cavity pole=5.6kHz)  * Measured IMC optical gain: 18.6 V/MHz (cavity pole=5.6kHz) (NOT UP TO DATE; we changed laser power, detection optics since then)
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 * 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
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  * (UPDATE SVN)   * 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
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 * Roughly measured beam profiles for Gouy telescope
  * http://klog.icrr.u-tokyo.ac.jp/osl/?r=3156
  * http://klog.icrr.u-tokyo.ac.jp/osl/?r=3218

Back to CommissioningWorkshop2017

IMC Information

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