LIGO-G010367-00-D

Latest Data from the Basement Anelastic Relaxation Facility

Phil Willems

Jaap Weel

Hanford LSC meeting, 2001

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Suspensions Apparatus

Automated fiber pulling lathe

Q-measurement rig

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Mode frequencies well fit by uniform model

Measured data

Fit of model to data

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Independent Measurement of Dilution Factor

For violin mode of fiber at thermoelastic strain point,

(df/dT)/f=(dE/dT)/2ED

where D is the dilution factor.

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Measured vs. Predicted Dilution Factors

Measured data

Prediction

(df/dT)/f=(dE/dT)/2ED

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Ringdown of 1st Harmonic

Q=4.2e8

f=1561 Hz

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Measured Q’s, very preliminary

Measured data

Model with NTE

Model without NTE