Indium joints for cryogenic gravitational wave detectors

Hofmann, G. et al. (2015) Indium joints for cryogenic gravitational wave detectors. Classical and Quantum Gravity, 32(24), 245013. (doi: 10.1088/0264-9381/32/24/245013)

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Abstract

A viable technique for the preparation of highly thermal conductive joints between sapphire components in gravitational wave detectors is presented. The mechanical loss of such a joint was determined to be as low as 2 × 10−3 at 20 K and 2 × 10−2 at 300 K. The thermal noise performance of a typical joint is compared to the requirements of the Japanese gravitational wave detector, KAGRA. It is shown that using such an indium joint in the suspension system allows it to operate with low thermal noise. Additionally, results on the maximum amount of heat which can be extracted via indium joints are presented. It is found that sapphire parts, joined by means of indium, are able to remove the residual heat load in the mirrors of KAGRA.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Masso Reid, Ms Mariela and Nawrodt, Dr Ronny and Hammond, Professor Giles and Reid, Professor Stuart and Rowan, Professor Sheila and Hough, Professor James and Haughian, Dr Karen and Murray, Dr Peter
Authors: Hofmann, G., Chen, D., Bergmann, G., Hammond, G. D., Hanke, M., Haughian, K., Heinert, D., Hough, J., Khalaidovski, A., Komma, J., Lück, H., Majorana, E., Masso Reid, M., Murray, P. G., Naticchioni, L., Nawrodt, R., Reid, S., Rowan, S., Schmidl, F., Schwarz, C., Seidel, P., Suzuki, T., Tomaru, T., Vine, D., and Yamamoto, K.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Classical and Quantum Gravity
Publisher:Institute of Physics
ISSN:0264-9381
ISSN (Online):1361-6382
Copyright Holders:Copyright © 2015 The Authors
First Published:First published in Classical and Quantum Gravity 32(24):245013
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
624341Investigations in Gravitational Radiation / Particle Astrophysics Capital equipmentSheila RowanScience & Technologies Facilities Council (STFC)ST/L000946/1S&E P&A - PHYSICS & ASTRONOMY