Mechanical quality factor of a sapphire fiber at cryogenic temperatures

Details Mechanical quality factor of a sapphire fiber at cryogenic temperatures Mechanical quality factor of a sapphire fiber at cryogenic temperatures

2000-07-27

arxiv.org/abs/gr-qc/0007071v1

Phys.Lett. A273 (2000) 310-315

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

To be published to Physiscs Letters A. Number of pages: 10 Number of figures: 5 Number of tables: 1

Scientific paper

10.1016/S0375-9601(00)00514-4

A mechanical quality factor of $1.1 \times 10^{7}$ was obtained for the 199
Hz bending vibrational mode in a monocrystalline sapphire fiber at 6 K.
Consequently, we confirm that pendulum thermal noise of cryogenic mirrors used
for gravitational wave detectors can be reduced by the sapphire fiber
suspension.

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