Measurement of the mechanical loss of a cooled reflective coating for gravitational wave detection

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dc.creatorYamamoto, Kazuhiro
dc.creatorMiyoki, Shinji
dc.creatorUchiyama, Takashi
dc.creatorIshitsuka, Hideki
dc.creatorOhashi, Masatake
dc.creatorKuroda, Kazuaki
dc.creatorTomaru, Takayuki
dc.creatorSato, Nobuaki
dc.creatorSuzuki, Toshikazu
dc.creatorHaruyama, Tomiyoshi
dc.creatorYamamoto, Akira
dc.creatorShintomi, Takakazu
dc.creatorNumata, Kenji
dc.creatorWaseda, Koichi
dc.creatorIto, Kazuhiko
dc.creatorWatanabe, Koji
dc.date2006-01-08
dc.date2006-07-22
dc.date.accessioned2026-07-07T06:58:03Z
dc.date.available2026-07-07T06:58:03Z
dc.descriptionWe have measured the mechanical loss of a dielectric multilayer reflective coating (ion-beam sputtered SiO$_2$ and Ta$_2$O$_5$) in cooled mirrors. The loss was nearly independent of the temperature (4 K $\sim$ 300 K), frequency, optical loss, and stress caused by the coating, and the details of the manufacturing processes. The loss angle was $(4 \sim 6) \times 10^{-4}$. The temperature independence of this loss implies that the amplitude of the coating thermal noise, which is a severe limit in any precise measurement, is proportional to the square root of the temperature. Sapphire mirrors at 20 K satisfy the requirement concerning the thermal noise of even future interferometric gravitational wave detector projects on the ground, for example, LCGT.
dc.description8 pages, 6 figures, 3 tables : accepted version (by Physical Review D)
dc.identifierhttps://arxiv.org/abs/gr-qc/0601031
dc.identifierhttp://arxiv.org/abs/gr-qc/0601031
dc.identifierPhysical Review D 74, 022002 (2006)
dc.identifierdoi:10.1103/PhysRevD.74.022002
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/107205
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectMaterials Science
dc.titleMeasurement of the mechanical loss of a cooled reflective coating for gravitational wave detection
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