Adv. LIGO Arm Length Stabilization Design

Document #:

LIGO-T0900144-v5

Document type:

T - Technical notes

Abstract:

The design of the arm length fluctuation system. This system aids in the lock acquisition of the interferometer by stabilising the arm cavity length fluctuations to within ~1.3 nm.

Files in Document:

• T0900144_v5_ALS_Design.pdf (1.2 MB)

Topics:

• Final Design
• Sensing and Control

Authors:

• Sam Waldman
• Daniel Shaddock
• Bram Slagmolen
• John Miller
• Peter Fritschel
• Adam Mullavey
• David McClelland

Notes and Changes:

Corrected equation 3, 10 log instead of 20 log as the phase is already in power. Figure 7 is not updated.

Related Documents:

• LIGO-G1000703: Arm Length Stabilization VCO Noise requirements