Discussion on Interferometer Configuration for O4

Document #:

JGW-G2011541-v5

Document type:

T

Submitted by:

Yuta Michimura

Updated by:

Yuta Michimura

Document Created:

09 Mar 2020, 12:47

Contents Revised:

09 Mar 2020, 18:46

Metadata Revised:

09 Mar 2020, 18:46

Abstract:

Document which discusses the answer and the measurements necessary to answer the following questions
- Cryogenic temperature necessary?
- Which SRM reflectivity?
- Polarizers in PRC and SRC necessary?
- ITM re-polishing and re-coating necessary?

v2: presented at the ISC meeting on March 9, 2020
http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/subgroup/ifo/MIF/Minutes20200309
v5: Updated to add the discussion at ISC meeting. Added executive summary and decision tree.

Files in Document:

• IFOConfigO4.pdf (1.0 MB)
• IFOConfigO4.ppt (1.1 MB)

Topics:

• Activity:KAGRA
• Detector:Interferometer

Authors:

• Yuta Michimura

Keywords:

ISC MIF

Related Documents:

• JGW-T1910396: Proposal to put polarizers inside PRC and SRC
• JGW-T1809078: *APPROVED* KAGRA Sensitivity for Observation Scenario Paper 2018
• JGW-T1808172: O3 Estimated Sensivitiy for FPMI, PRFPMI and RSE
• JGW-T1910352: On the effect of arm cavity finesse asymmetry to O3 sensitivity

Referenced by:

• JGW-T2011662: Summary of Sensitivity Estimate for O4 in Various Interferometer Configurations

Approved for use in external presentations:

Unapproved