LIGO Document T1000555-v4

Adv. LIGO Arm Length Stabilisation - Vertex Layout Overview

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T - Technical notes
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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.

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Notes and Changes:

  • Updated all figures and added DCC for them were applicable.

  • removed ’Draft’.

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