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Investigation of mechanical loss factors of some candidate materials for the test masses of gravitational wave detectors

✍ Scribed by S. Rowan; G. Cagnoli; P. Sneddon; J. Hough; R. Route; E.K. Gustafson; M.M. Fejer; V. Mitrofanov

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
98 KB
Volume
265
Category
Article
ISSN
0375-9601

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✦ Synopsis

This Letter describes the results of investigations into the mechanical losses of a selection of crystalline materials with the potential for use as the test masses in advanced gravitational wave detectors. We have measured loss factors of 3.7 = 10 y9 for HEM sapphire, to our knowledge the lowest measured loss factors of sapphire grown by a method suitable to produce test masses of the size and quality needed for use in advanced interferometric detectors. We also present the first measurements of the mechanical loss factors of YAG and Spinel at frequencies of interest for gravitational wave detection.

πŸ“œ SIMILAR VOLUMES

Mechanical quality factor of a cryogenic
Mechanical quality factor of a cryogenic sapphire test mass for gravitational wave detectors
✍ T. Uchiyama; T. Tomaru; M.E. Tobar; D. Tatsumi; S. Miyoki; M. Ohashi; K. Kuroda; πŸ“‚ Article πŸ“… 1999 πŸ› Elsevier Science 🌐 English βš– 195 KB

A sapphire cylinder, of 100 mm diameter and 60 mm length, was suspended on a pair of sapphire fibers to simulate a mirror for a cryogenic laser interferometric gravitational wave detector. A mechanical quality factor of 2.5 = 10 8 was obtained for the second axial symmetric mode of the cylinder at 4