Final design and implementation of the KAGRA green lock system

Document #:

JGW-T2112858-v4

Document type:

T

Submitted by:

Kiwamu Izumi

Updated by:

Kiwamu Izumi

Document Created:

29 Apr 2021, 08:31

Contents Revised:

04 Oct 2021, 15:17

DB Info Revised:

04 Oct 2021, 15:17

Abstract:

This document summarizes the design and current implementation of the green lock system or ALS (Arm Length Stabilization) system as a snapshot as of April 2021. For historical reasons, we refer this particular system either ALS system or green lock (GRE) system.

Files in Document:

• T2112858_GRE_FDID_v4.pdf (382.2 kB)

Other Files:

• T2112858_GRE_FDID_v4.tex (21.0 kB)

Topics:

• Detector:Interferometer Sensing and Control
• Detector:Interferometer
• Detector:Interferometer Sensing and Control:Length Sensing and Control
• Activity:KAGRA

Authors:

• Kiwamu Izumi

Keywords:

MIF ISC ALS lock acquisition final design implementation

Notes and Changes:

v4: Part numbers for the Prometheus lasers were wrong and fixed.

Referenced by:

• JGW-T2112889: Design of modified zig-zag optical path for FNC
• JGW-T2112955: Concept of modified Fiber Noise Cancellation
• JGW-E1807769: Document Tree for Arm Length Stabilization System
• JGW-T2213847: Recognition of issues for KAGRA GRE (ALS) system