Differences between revisions 10 and 32 (spanning 22 versions)
Revision 10 as of 2021-02-26 22:39:45
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Revision 32 as of 2021-08-11 16:03:32
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Check also [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?dochttps://mail.google.com/mail/u/2/id=4014|MIR Document and Drawings Tree]]
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 * f1 frequency
 * f2 frequency
 * f1 modulation depth
 * f2 modulation depth
 * f1 frequency: 16.8732705 MHz https://klog.icrr.u-tokyo.ac.jp/osl/?r=4831
 * f2 frequency: 44.995388 MHz https://klog.icrr.u-tokyo.ac.jp/osl/?r=4831
 * f1 modulation depth: 0.22(2) using Y arm https://klog.icrr.u-tokyo.ac.jp/osl/?r=9505
  * 0.24(1) using X arm, before Harmonic Generator installation on 2019/2/14 https://klog.icrr.u-tokyo.ac.jp/osl/?r=7307
 * f2 modulation depth: 0.23(2) using Y arm https://klog.icrr.u-tokyo.ac.jp/osl/?r=9505
  * 0.0053(2) using X arm, before Harmonic Generator installation on 2019/2/14 https://klog.icrr.u-tokyo.ac.jp/osl/?r=7307
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  * '''Notes''': Measured on April 2018. Any re-installation after this?   * '''Notes''': Measured on April 2018. Any re-installation after this? Needs to be adjusted to match with PRC length.
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  * '''Design''': ~500   * '''Design''': 520
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  * '''Measurement method''': Ring down, http://klog.icrr.u-tokyo.ac.jp/osl/?r=9052, http://klog.icrr.u-tokyo.ac.jp/osl/?r=9211, http://klog.icrr.u- tokyo.ac.jp/osl/?r=9496   * '''Measurement method''': Ring down, http://klog.icrr.u-tokyo.ac.jp/osl/?r=9052, http://klog.icrr.u-tokyo.ac.jp/osl/?r=9211, http://klog.icrr.u-tokyo.ac.jp/osl/?r=9496
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  * '''Measured''':
  * '''Measurement method''':
  * '''Measured''': NOT YET MEASURED? :o
  * '''Measurement method''': https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11633
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  * '''Design''':
  * '''Measured''':
  * '''Measurement method''':
  * '''Notes''':
  * '''Design''': 68.2563 m (PRC length = 66.591 m)
  * '''Measured''': 68 m
  * '''Measurement method''': Using dnu/nu=dL/L https://klog.icrr.u-tokyo.ac.jp/osl/?r=14633
  * '''Notes''': Compare it with PRY.
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  * '''Design''':
  * '''Measured''':
  * '''Measurement method''':
  * '''Notes''':
  * '''Design''': 64.9265 m
  * '''Measured''': 70.2 m
  * '''Measurement method''': Using dnu/nu=dL/L https://klog.icrr.u-tokyo.ac.jp/osl/?r=14565
  * '''Notes''': In consistent results between different methods and not compatible with Schnupp asymmetry measurement :o
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  * '''Design''':
  * '''Measured''':
  * '''Measurement method''':
  * '''Notes''':
  * '''Design''': 33.0 deg
  * '''Measured''': 31(1) deg
  * '''Measurement method''': Cavity scan with the inertia locking method http://klog.icrr.u-tokyo.ac.jp/osl/?r=9276
  * '''Notes''': After PR2 was moved. New measurement says 26.6 +/- 1.5 deg (round-trip) https://klog.icrr.u-tokyo.ac.jp/osl/?r=15179
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  * '''Design''':   * '''Design''': 68.2563 m (SRC length = 66.591 m)
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  * '''Design''':   * '''Design''': 64.9265 m
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  * '''Design''':
  * '''Measured''':
  * '''Measurement method''':
  * '''Notes''':
  * '''Design''': 35.0
  * '''Measured''': 48(2) :o
  * '''Measurement method''': Cavity scan with the inertia locking method http://klog.icrr.u-tokyo.ac.jp/osl/?r=9246
  * '''Notes''': New measurement says 80.18 +/- 5.9 deg (round-trip) https://klog.icrr.u-tokyo.ac.jp/osl/?r=15179
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  * '''Design''':
  * '''Measured''':
  * '''Measurement method''':
  * '''Notes''':
  * '''Design''': 3.3299 m
  * '''Measured''': 3.36(1) m
  * '''Measurement method''': Demodulation phase difference in locking X-arm and Y-arm https://klog.icrr.u-tokyo.ac.jp/osl/?r=14575
  * '''Notes''': Not consistent with PRX and PRY measurements.
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  * '''Measured''':
  * '''Measurement method''':
  * '''Notes''':

== Power
Recycled Fabry-Perot Michelson ==
 * Power recycling gain
  * '''
Design''':
  * '''Measured''':
  * '''Measurement method''':

  * '''Notes''':
 * Power at each ISC detection ports when locked
  * '''Measured''': ~3 :o
  * '''Measurement method''': REFERENCE TO BE ADDED
  * '''Notes''':
 * Power at each ISC detection ports when DRMI is locked
  * IMC output:
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== Power Recycled Fabry-Perot Michelson ==
 * Power recycling gain for carrier
  * '''Design''': 10
  * '''Measured''': 10-12
  * '''Measurement method''': arm cavity transmitted power enhancement https://klog.icrr.u-tokyo.ac.jp/osl/?r=12639
  * '''Notes''': https://klog.icrr.u-tokyo.ac.jp/osl/?r=12643
 * Power recycling gain for f1 sideband
  * '''Design''':
  * '''Measured''':
  * '''Measurement method''':
  * '''Notes''':
 * Power recycling gain for f2 sideband
  * '''Design''':
  * '''Measured''':
  * '''Measurement method''':
  * '''Notes''':
 * Power at each ISC detection ports when PRFPMI is locked
  * IMC output:
  * REFL:
  * POP p-pol:
  * POP s-pol:
  * POS p-pol:
  * POS s-pol:
  * AS RF:
  * OMC REFL:
  * OMC TRANS:
  * TRX:
  * TRY:
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  * '''Design''':
  * '''Measured''':
  * '''Measurement method''':
  * '''Design''': 1.5 m
  * '''Measured''': 2 * 0.717(2) m = 1.434(4) m
  * '''Measurement method''': Cavity scan FSR of 208.99(65) MHz https://klog.icrr.u-tokyo.ac.jp//?r=14696
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  * '''Design''':
  * '''Measured''':
  * '''Measurement method''':
  * '''Notes''':
  * '''Design''': 780
  * '''Measured''': 616(62)
  * '''Measurement method''': Cavity scan https://klog.icrr.u-tokyo.ac.jp//?r=14696
  * '''Notes''':
 * AS mode content

== Sensing Matrix Measurements ==
 * LSC

 * ASC

== Optical Tables ==
I think we need a power budget here.

http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/IOO/OutputTables/Optics

IMC REFL (and TRANS): note that BSW11 is used (Ts=~40%, not 50%) https://klog.icrr.u-tokyo.ac.jp/osl/?r=3726

REFL table layout: note that p-pol is coming out from the chamber https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9238

POP table layout (Only cameras for POP s-pol and p-pol?) https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9623

POS table layout (DC PDs for POS s-pol and p-pol) https://klog.icrr.u-tokyo.ac.jp/osl/?r=14622

== Others ==
 * Laser intensity/frequency noise coupling
 * MICH/PRCL/SRCL to DARM coupling
 * MICH contrast defect
 * Type-A, B, Bp actuation efficiency measurements

Optical Characterization

This page is intended for summarizing the interferometer optical characterization results and discussions. See following pages and documents for iKAGRA and bKAGRA Phase-1 characterization summary:

See following pages for some design parameters

Check also MIR Document and Drawings Tree

RF Sidebands

Input Mode Cleaner

Arm Cavities

Power Recycling Cavity

Signal Recycling Cavity

Michelson

  • Schnupp asymmetry

Dual Recycled Michelson

  • Power recycling gain
    • Design:

    • Measured: ~3 :o

    • Measurement method: REFERENCE TO BE ADDED

    • Notes:

  • Power at each ISC detection ports when DRMI is locked
    • IMC output:
    • REFL:
    • POP p-pol:
    • POP s-pol:
    • POS p-pol:
    • POS s-pol:
    • AS RF:
    • OMC REFL:
    • OMC TRANS:
    • TRX:
    • TRY:

Power Recycled Fabry-Perot Michelson

  • Power recycling gain for carrier
  • Power recycling gain for f1 sideband
    • Design:

    • Measured:

    • Measurement method:

    • Notes:

  • Power recycling gain for f2 sideband
    • Design:

    • Measured:

    • Measurement method:

    • Notes:

  • Power at each ISC detection ports when PRFPMI is locked
    • IMC output:
    • REFL:
    • POP p-pol:
    • POP s-pol:
    • POS p-pol:
    • POS s-pol:
    • AS RF:
    • OMC REFL:
    • OMC TRANS:
    • TRX:
    • TRY:

Output Mode Cleaner

Sensing Matrix Measurements

  • LSC
  • ASC

Optical Tables

I think we need a power budget here.

http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/IOO/OutputTables/Optics

IMC REFL (and TRANS): note that BSW11 is used (Ts=~40%, not 50%) https://klog.icrr.u-tokyo.ac.jp/osl/?r=3726

REFL table layout: note that p-pol is coming out from the chamber https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9238

POP table layout (Only cameras for POP s-pol and p-pol?) https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9623

POS table layout (DC PDs for POS s-pol and p-pol) https://klog.icrr.u-tokyo.ac.jp/osl/?r=14622

Others

  • Laser intensity/frequency noise coupling
  • MICH/PRCL/SRCL to DARM coupling
  • MICH contrast defect
  • Type-A, B, Bp actuation efficiency measurements

KAGRA/Subgroups/MIF/OpticalCharacterization (last edited 2021-08-11 16:03:32 by YutaMichimura)