Violin Mode Frequency/Q Summary as predicted by Models

Document #:

LIGO-T1300876-v4

Document type:

T - Technical notes

Abstract:

The theory of violin modes and a table of expected values for all suspension types.

Files in Document:

• T1300876-v4.pdf (1.1 MB)

Other Files:

• T1300876-v4.docx (2.1 MB)

Topics:

• Final Design
• Suspensions

Authors:

• Mark Barton

Keywords:

SUS suspensions violin

Notes and Changes:

-v3: fix equation numbering and (new) Eq 1.11 (r should have been d)

3/7/2015 note from Dennis Coyne: The quad fiber violin frequencies in section 3.1 are incorrect (by a factor of ~2) because the fiber radius is assumed to be 0.4 mm, whereas this is the diameter (over most of the fiber length).

-v4: Fix issue with fibre modes noted by Dennis by upgrading from model 20120601TMproductionTM to 20140304TMproductionTM.

Related Documents:

• LIGO-T1200418: LLO MC2 Violin Mode Q
• LIGO-T1300926: HLTS Violin Mode Q

Referenced by:

• LIGO-T1400185: aLIGO Resonances
• LIGO-E1200933: aLIGO SUS General Documentation