文档介绍：ARTICLE IN PRESS
Cryogenics xxx (2006) xxx–xxx
ate/cryogenics
Cryogenic infrared mission ‘‘JAXA/SPICA’’ with advanced cryocoolers
Hiroyuki Sugita a,*, Takao Nakagawa b, Hiroshi Murakami b, Atsushi Okamoto a,
Hiroki Nagai c, Masahide Murakami d, Katsuhiro Narasaki e,
Masayuki Hirabayashi e, SPICA Working Group
a Institute of Aerospace Technology, Japan Aerospace Exploration Agency, 2-1-1 Sengen Tsukuba, Ibaraki 305-8505, Japan
b Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510, Japan
c Department of Aerospace Engineering, Tohoku University, 6-6-01, Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8579, Japan
d Institute of Engineering Mechanics and Systems, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
e Sumitomo Heavy Industries, Ltd., Niihama Works, 5-2 Soubiraki-cho, Niihama, Ehime 792-8588, Japan
Received 28 November 2005; accepted 28 November 2005
Abstract
Since the next cryogenic infrared mission ‘‘JAXA/SPICA’’ employs advanced mechanical cryocoolers with effective radiant cooling in
place of cryogen, the primary mirror, m in diameter, and the optical bench can be maintained at K for at least 5 years. First, the
feasibility of the thermal design of the cryogenic system is presented. A 20 K-class Stirling cryocooler was then improved in