Adv. LIGO Arm Length Stabilisation - Vertex Layout Overview

Document #:

LIGO-T1000555-v4

Document type:

T - Technical notes

Abstract:

The Arm Length Stabilisation system has been described in T0900144. In this note we describe the optical layout of the system in the corner station in more detail.

The major change is to relocate the critical ALS signal detection from the PSL table to ISCT1 in-air table. This is to ease commissioning efforts of the ALS system by limiting the need to access the PSL enclosure.

Files in Document:

• T1000555_v4_ALS_Vertex_Setup.pdf (655.6 kB)

Other Files:

• ALS_Vertex_OverviewV2.pdf (263.0 kB)

Topics:

• Final Design
• Sensing and Control

Authors:

• Bram Slagmolen
• John Miller

Keywords:

ALS ISC

Notes and Changes:

Updated all figures and added DCC for them were applicable.

removed ’Draft’.

Referenced by:

• LIGO-E1200169: aLIGO, ISC, ALS
• LIGO-G1500456-v4: CARM / ALS Electro-Optical Controls Diagram
• LIGO-G1400519-v3: Impressions of CARM/ALS