Differences between revisions 1 and 3 (spanning 2 versions)

ISC Meeting on 2020/06/15 14:00 - 15:00

Participants:

Zoom meeting: https://zoom.us/j/6676627462

Next meeting

TBD

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Minutes

Agenda

Useful links to know KAGRA interferometer design and status
- List of optical parameters OptParam
- MIF Design document JGW-T1200913
- Interferometer design paper Phys. Rev. D 88, 043007 (2013)
- Latest KAGRA status paper arXiv:2005.05574
- Summary of measurements related to the interferometer so far Minutes20200309
- O4 schedule JGW-E1809209
Interferometer issues which require simulation studies
- ITMs have different transmission (ITMX: 0.444 % ITMY: 0.479%) JGW-T1910352
- ITMs have inhomogeneity Phys. Rev. D 100, 082005 (2019)
- ITMs have inhomogeneous birefringence JGW-G1910369, JGW-G1910388, JGW-T2011633
- So far no success in locking DRFPMI JGW-G2011693
- WFS not working well JGW-G2011687
- Laser intensity noise and frequency noise coupling are too high JGW-T2011662
Status of simulation activities
- LSC simulations with Optickle originally by Yoichi Aso https://granite.phys.s.u-tokyo.ac.jp/svn/LCGT/trunk/mif/IFOmodel
  - Used for designing the interferometer, and deriving requirements JGW-T1200913
  - Simulations for O3 by Yutaro Enomoto JGW-T1910341
  - Mach-Zehnder modulator simulations by Kohei Yamamoto Classical and Quantum Gravity 36, 205009 (2019)
- ASC simulations with Optickle originally by Yuta Michimura https://granite.phys.s.u-tokyo.ac.jp/svn/LCGT/trunk/mif/ASC-Optickle
  - Used for designing the interferometer JGW-T1200913
  - Simulations for O3 by Yuta Michimura JGW-T1910359
- FINESSE model originally by Kentaro Somiya
  - Used for OMC design Optical Review 22, 149-152 (2015), J. Phys.: Conf. Ser. 957, 012009 (2018)
  - ITM inhomogeneity effects Phys. Rev. D 100, 082005 (2019)
  - Also being used for simulating birefringence effects
- Parametric instability
  - Activities in University of Toyama using COMSOL JGW-E1910382
- Thermal lensing ?
Simulation activities necessary
- LSC and ASC simulations with current ITMs and current interferometer setup
  - Especially LSC simulations not done for PRFPMI and DRMI, and 3f locking
  - Compare measured sensing matrix with simulations
  - Compare measured AS mode content with simulations
  - Compare measured MICH/PRCL/SRCL controls noise coupling with simulations
  - Compare measured intensity/frequency noise coupling with simulations

KAGRA/subgroup/ifo/MIF/Minutes20200615 (last edited 2020-06-15 15:21:06 by YutaMichimura)

-  ⇤ ← Revision 1 as of 2020-06-01 08:45:38 → 
  Size: 582
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  Comment:
+   ← Revision 3 as of 2020-06-01 09:25:59 → ⇥
  Size: 4163
  Editor: YutaMichimura
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
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-  * [[LCGT/subgroup/ifo/MIF/OptParam|Optical parameters]]
+  * List of optical parameters [[LCGT/subgroup/ifo/MIF/OptParam|OptParam]]
 Line 18:
+  * Interferometer design paper [[https://journals.aps.org/prd/abstract/10.1103/PhysRevD.88.043007|Phys. Rev. D 88, 043007 (2013)]]
  * Latest KAGRA status paper [[https://arxiv.org/abs/2005.05574|arXiv:2005.05574]]
  * Summary of measurements related to the interferometer so far [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/subgroup/ifo/MIF/Minutes20200309|Minutes20200309]]
  * O4 schedule [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9209|JGW-E1809209]]
-Line 19:
+Line 23:
- * Interferometer issues we have now
+ * Interferometer issues which require simulation studies
  * ITMs have different transmission (ITMX: 0.444 % ITMY: 0.479%) [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=10352|JGW-T1910352]]
  * ITMs have inhomogeneity [[https://doi.org/10.1103/PhysRevD.100.082005|Phys. Rev. D 100, 082005 (2019)]]
  * ITMs have inhomogeneous birefringence [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=10369|JGW-G1910369]], [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=10388|JGW-G1910388]], [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=11633|JGW-T2011633]]
  * So far no success in locking DRFPMI [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11693|JGW-G2011693]]
  * WFS not working well [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11687|JGW-G2011687]]
  * Laser intensity noise and frequency noise coupling are too high [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11662|JGW-T2011662]]
-Line 22:
+Line 32:
+  * LSC simulations with Optickle originally by Yoichi Aso https://granite.phys.s.u-tokyo.ac.jp/svn/LCGT/trunk/mif/IFOmodel
   * Used for designing the interferometer, and deriving requirements [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=913|JGW-T1200913]]
   * Simulations for O3 by Yutaro Enomoto [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=10341|JGW-T1910341]]
   * Mach-Zehnder modulator simulations by Kohei Yamamoto [[https://doi.org/10.1088/1361-6382/ab4489|Classical and Quantum Gravity 36, 205009 (2019)]]
  * ASC simulations with Optickle originally by Yuta Michimura https://granite.phys.s.u-tokyo.ac.jp/svn/LCGT/trunk/mif/ASC-Optickle
   * Used for designing the interferometer [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=913|JGW-T1200913]]
   * Simulations for O3 by Yuta Michimura [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=10359|JGW-T1910359]]
  * FINESSE model originally by Kentaro Somiya
   * Used for OMC design [[https://link.springer.com/article/10.1007/s10043-015-0028-2|Optical Review 22, 149-152 (2015)]], [[https://iopscience.iop.org/article/10.1088/1742-6596/957/1/012009|J. Phys.: Conf. Ser. 957, 012009 (2018)]]
   * ITM inhomogeneity effects [[https://doi.org/10.1103/PhysRevD.100.082005|Phys. Rev. D 100, 082005 (2019)]]
   * Also being used for simulating birefringence effects
  * Parametric instability
   * Activities in University of Toyama using COMSOL [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=10382|JGW-E1910382]]
  * Thermal lensing ?
-Line 24:
+Line 48:
+  * LSC and ASC simulations with current ITMs and current interferometer setup
   * Especially LSC simulations not done for PRFPMI and DRMI, and 3f locking
   * Compare measured sensing matrix with simulations
   * Compare measured AS mode content with simulations
   * Compare measured MICH/PRCL/SRCL controls noise coupling with simulations
   * Compare measured intensity/frequency noise coupling with simulations