Measurement of Outgassing Rate from the Aluminized Polyester Film of Multilayer Insulation
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- TAKADA Satoshi
- Teikyo University
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- SATO Yoshihiro
- High Energy Accelerator Research Organization
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- OHMORI Takao
- Teikyo University
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- SAITO Yoshio
- High Energy Accelerator Research Organization
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- SUZUKI Toshikazu
- High Energy Accelerator Research Organization
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- KIMURA Nobuhiro
- High Energy Accelerator Research Organization
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- TOMARU Takayuki
- High Energy Accelerator Research Organization
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- KUMAN Tsuyoshi
- Tochigi Kaneka Corp.
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- NISHIDA Shigeo
- Kaneka Corporation
Bibliographic Information
- Other Title
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- 真空多層断熱材用アルミ蒸着ポリエステルフィルムの気体放出速度の測定
- シンクウ タソウ ダンネツザイヨウ アルミ ジョウチャク ポリエステルフィルム ノ キタイ ホウシュツ ソクド ノ ソクテイ
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Abstract
Evacuated multilayer insulation (MLI) for thermal insulation of the laser interferometer mirror, which is cooled to cryogenic temperatures, is used in the large-scale cryogenic gravitational wave telescope KAGRA. This MLI consists of alternating layers of aluminized polyethylene terephthalate (PET) and lightweight fibrous PET spacers. In a vacuum, however, water molecules outgassed from MLI might degrade the interferometer performance owing to their condensation on the mirror. We have developed new MLIs with thinner PET spacers, whose mass is 30% lighter than that of the conventional one, to reduce outgassing rate. In this study, outgassing rate of new MLIs was measured from the pressure decrease rate in a vacuum chamber for 300 hours. After 100 hours of vacuum testing, its outgassing rate was about half of that for the previous MLI, and comparable to that of electropoloshed stainless steel (SUS304).<br>
Journal
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- Journal of the Vacuum Society of Japan
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Journal of the Vacuum Society of Japan 57 (6), 233-238, 2014
The Vacuum Society of Japan
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Details 詳細情報について
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- CRID
- 1390001205294955648
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- NII Article ID
- 130004952520
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- NII Book ID
- AA12298652
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- ISSN
- 18824749
- 18822398
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- NDL BIB ID
- 025499483
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed