LIGO Document T1200418-v4

LLO MC2 Violin Mode Q

Document #:
LIGO-T1200418-v4
Document type:
T - Technical notes
Other Versions:
LIGO-T1200418-v3
22 Apr 2013, 14:01
LIGO-T1200418-v1
28 Aug 2012, 14:13
Abstract:
This is a writeup of a quick calculation to understand the measured violin mode Q of the MC2 suspension at LLO but is applicable to all HSTS. The interesting conclusion is that the violin mode Q is dominated by thermoelastic damping which has its peak nearby.
Files in Document:
Other Files:
Notes and Changes:
Various refinements suggested by Jeff K, including a calculation of net thermal noise. Incorporate refitted Qs from LLO alog 5280.

v4: Corrected typo error in equation (1.8) in docx and pdf files (radius has been replaced by diameter). This does not affect results. (Norna, 9th August 2014)

Referenced by:

DCC Version 3.3.0, contact Document Database Administrators