Mechanical quality factor of mirror substrates for VIRGO

Details Mechanical quality factor of mirror substrates for VIRGO Mechanical quality factor of mirror substrates for VIRGO

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002cqgra..19.1663a&link_type=abstract

Classical and Quantum Gravity, Volume 19, Issue 7, pp. 1663-1668 (2002).

Physics

7

Scientific paper

Thermal noise in the mirror substrates is expected to be the main limit to the VIRGO sensitivity in the 50-500 Hz frequency range. The mechanical quality of the mirror substrates and the geometry of their suspension are expected to affect the noise level of the detector output. High mechanical Q have been obtained for different large fused silica substrates under VIRGO suspension conditions. Moreover, calcium fluoride substrates are shown to provide a more promising option for the design of future cryogenic, low thermal noise interferometers.

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