Portal de Periódicos da CAPES

Cooling system for the soft X-ray spectrometer onboard Astro-H

2010; Elsevier BV; Volume: 50; Issue: 9 Linguagem: Inglês

10.1016/j.cryogenics.2010.02.004

1879-2235

Ryuichi Fujimoto, Kazuhisa Mitsuda, Noriko Y. Yamasaki, Yoh Takei, Masahiro Tsujimoto, Hiroyuki Sugita, Yukio Sato, Keisuke Shinozaki, Takaya Ohashi, Yoshitaka Ishisaki, Yuichiro Ezoe, Masahide Murakami, Shunji Kitamoto, Hiroshi Murakami, Toru Tamagawa, Madoka Kawaharada, Hiroya Yamaguchi, Kosuke Sato, Kenichi Kanao, Seiji Yoshida, Mike DiPirro, Peter Shirron, Gary A. Sneiderman, Richard L. Kelley, F. S. Porter, C. A. Kilbourne, John Crow, A. Mattern, Ali Kashani, D. McCammon, Jan-Willem den Herder,

Superconducting Materials and Applications

The Soft X-ray Spectrometer (SXS) is a cryogenic high resolution X-ray spectrometer onboard the X-ray astronomy satellite Astro-H which will be launched in 2014. The detector array is cooled down to 50 mK using an adiabatic demagnetization refrigerator (ADR). The cooling chain from the room temperature to the ADR heat-sink is composed of superfluid liquid He, a Joule–Thomson cryocooler, and double-stage Stirling cryocoolers. It is designed to keep 30 l of liquid He for more than 5 years in the normal case, and longer than 3 years even if one of the cryocoolers fails. Cryogen-free operation is also possible in the normal case. It is fully redundant from the room temperature to the ADR heat-sink.