LIGO Document G1101096-v1

Material Loss Angles from Direct Measurements of Broadband Thermal Noise: Statistical Analysis and Preliminary Comparison with Results from Mixture Theory

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The loss angles of Silica and (plain and Titania-doped) Tantala have been estimated from the direct measurement of coating thermal noise using the TNI.
A simple predictive model for composite material properties based on EMT gives results for the doped Tantala loss angle which are consistent with the above findings.

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