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Material loss angles from direct measurements of broadband thermal noise

Principe, Maria and Pinto, Innocenzo M. and Pierro, Vincenzo and DeSalvo, Riccardo and Taurasi, Ilaria and Villar, Akira E. and Black, Eric D. and Libbrecht, Kenneth G. and Michel, Christophe and Morgado, Nazario and Pinard, Laurent (2015) Material loss angles from direct measurements of broadband thermal noise. Physical Review D, 91 (2). Art. No. 022005. ISSN 2470-0010. https://resolver.caltech.edu/CaltechAUTHORS:20150316-084111993

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Abstract

We estimate the loss angles of the materials currently used in the highly reflective test-mass coatings of interferometric detectors of gravitational waves, namely Silica, Tantala, and Ti-doped Tantala, from direct measurement of coating thermal noise in an optical interferometer testbench, the Caltech TNI. We also present a simple predictive theory for the material properties of amorphous glassy oxide mixtures, which gives results in good agreement with our measurements on Ti-doped Tantala. Alternative measurement methods and results are reviewed, and some critical issues are discussed.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRevD.91.022005DOIArticle
http://journals.aps.org/prd/abstract/10.1103/PhysRevD.91.022005PublisherArticle
http://arxiv.org/abs/1501.06371arXivDiscussion Paper
ORCID:
AuthorORCID
Libbrecht, Kenneth G.0000-0002-8744-3298
Additional Information:© 2015 American Physical Society. Received 27 August 2014. This work has been supported in part by the NSF under Cooperative Agreement No. PHY-0757058 and the Italian National Institute for Nuclear Physics (INFN) under the CSN-V COAT grant. Stimulating discussions with V. B. Braginsky, G. Cagnoli, R. Flaminio, P. Fritschel, G. Harry, K. Kuroda, J. M. Mackowski, I. Martin, N. Mio, and S. Penn are gratefully acknowledged.
Group:LIGO
Funders:
Funding AgencyGrant Number
NSFPHY-0757058
Istituto Nazionale di Fisica Nucleare (INFN)UNSPECIFIED
Issue or Number:2
Classification Code:PACS numbers: 04.80.Nn, 05.40.Ca, 07.60.Ly, 95.55.Ym
Record Number:CaltechAUTHORS:20150316-084111993
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150316-084111993
Official Citation:Principe, M., Pinto, I. M., Pierro, V., DeSalvo, R., Taurasi, I., Villar, A. E., . . . Pinard, L. (2015). Material loss angles from direct measurements of broadband thermal noise. Physical Review D, 91(2), 022005.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:55765
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:16 Mar 2015 21:48
Last Modified:24 Jan 2020 19:04

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