Measurement of Outgassing from Multi-Layered Insulators for the Cryogenic Lase Interferometer Observatory

Details Measurement of Outgassing from Multi-Layered Insulators for the Cryogenic Lase Interferometer Observatory Measurement of Outgassing from Multi-Layered Insulators for the Cryogenic Lase Interferometer Observatory

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....5.3107u&link_type=abstract

Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I

Physics

Scientific paper

We measured the outgassing from the radiation shields of cryostats and evaluated the vacuum pressure in the cryostat of the Cryogenic Laser Interferometer Observatory (CLIO) project. The radiation shield is an aluminum plate covered by 40 layered insulator films. The insulator films are considered to be the dominant outgas source because of their large surface area in the cryostat. The outgassing from the radiation shield is 3.6 × 10-6 [Pa m3 /sec/m2 ] after 100 hours of evacuation. From this result, the total outgassing in a cryostat of the CLIO project, which has a radiation shield covering 6 m2 surface area is more than 2.2 × 10-5 [Pa m3 /sec] at 100 hour evacuation.

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