Cryogenic contamination speed for cryogenic laser interferometric gravitational wave detector

Authors
Miyoki, S Tomaru, T Ishitsuka, H Ohashi, M Kuroda, K Tatsumi, D Uchiyama, T Suzuki, T Sato, N Haruyama, T Yamamoto, A Shintomi, T
Citation
S. Miyoki et al., Cryogenic contamination speed for cryogenic laser interferometric gravitational wave detector, CRYOGENICS, 41(5-6), 2001, pp. 415-420
Citations number
17
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Mechanical Engineering
Journal title
CRYOGENICS
ISSN journal
00112275 → ACNP
Volume
41
Issue
5-6
Year of publication
2001
Pages
415 - 420
Database
ISI
SICI code
0011-2275(200105/06)41:5-6<415:CCSFCL>2.0.ZU;2-Y
Abstract
The reflectance of an ultra-low loss dielectric multilayer coating mirror, which was cooled at 10 K and exposed to 300 K vacuum space, was monitored a s the finesse of a Fabry-Perot cavity for two months. The reflectance was m easured to decrease with a rate of 0.12(-0.08)(+0.12) ppm per day. Accounti ng for this result. the cryogenic system for a gravitational wave laser int erferometer such as LCGT requires several tens of meters of radiation shiel ds inside its vacuum ducts to keep its optical performance. (C) 2001 Elsevi er Science Ltd. All rights reserved.