Initial Alignment of PR3, ITM, and ETM prior to 1st Light Down the Arms

Document #:

LIGO-T1000493-v1

Document type:

T - Technical notes

Abstract:

This note describes a procedure for aligning the PR3, ITM, and ETM mirrors prior to achieving 1st light down the arms.

Files in Document:

• T1000493-v1_initial alignment of PR3-ITM-ETM.pdf (23.2 kB)

Topics:

• Auxiliary Optics
• Installation

Authors:

• Michael Smith

Keywords:

IFO Initial Alignment aLIGO

Notes and Changes:

THIS IS AN OBSOLETE NOTE. We are exploring other ways to align the optics with the arm cavity baffle in place, e.g. adding an array of 4 photodiodes around the perimeter of the arm cavity baffle. TBD