Parametric instabilities and their control in advanced interferometer gravitational-wave detectors

• Published in: Physical review letters Vol. 94; no. 12; p. 121102
• Main Authors: Zhao, C, Ju, L, Degallaix, J, Gras, S, Blair, D G
• Format: Journal Article
• Language: English
• Published: United States 01.04.2005

A detailed simulation of Advanced LIGO test mass optical cavities shows that parametric instabilities will excite 7 acoustic modes in each fused silica test mass, with parametric gain R up to 7 and only 1 acoustic mode with R approximately 2 for alternative sapphire test masses. Fine-tuning of the t...