Measurements of Q in Suprasil 311SV

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Presentation transcript:

Measurements of Q in Suprasil 311SV Phil Willems Dan Busby Caltech LSC Meeting, Hanford WA November 10-13, 2003 LIGO R&D

No Clear Difference Between the Two Suprasil 312 Suprasil 311SV LIGO R&D

Commentary The best Q in 311SV is not as high as for the best mode in 312, but is as high as the second best mode, and at the same frequency. This mass was smaller (6” dia. by 2” thick vs. 10” dia. by 4” thick for the 312), and so had higher frequency modes. The mode with low Q at 13 kHz was measured once in three months of work. Neither mass has been annealed. LIGO R&D

LIGO R&D