Thermal design and its on-orbit performance of the AKARI cryostat |
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| Authors: | Masayuki Hirabayashi Katsuhiro Narasaki Shoji Tsunematsu Yoshiyuki Kimura Seiji Yoshida Hiroshi Murakami Takao Nakagawa Akira Ohnishi Toshio Matsumoto Hidehiro Kaneda Keigo Enya Masahide Murakami |
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| Affiliation: | 1. Sumitomo Heavy Industries, Ltd., Quantum Equipment Division, 5-2 Soubiraki-cho, Niihama, Ehime 792-8588, Japan;2. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510, Japan;3. Institute of Engineering Mechanics and Systems, University of Tsukuba, 1-1-1 Ten-nodai, Tsukuba, Ibaraki 305-8573, Japan;1. School of Science, Shenyang Ligong University, Shenyang, Liaoning 110168, China;2. Liquid Crystal Institute, Kent State University, Kent, OH 44242, USA;1. Department of Geophysics, Graduate School of Science, Tohoku University, Sendai, Miyagi 980-8578, Japan;2. Istituto di Astrofisica e Planetologia Spaziali (IAPS), Istituto Nazionale di Astrofisica (INAF), Via del Fosso del Cavaliere 100, 00133 Roma, Italy;1. Materials Engineering Branch (Code 541), NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA;2. Sandia National Laboratories, PO Box 5800, MS0889, Albuquerque, NM 87185-0889, USA;3. Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD 21218, USA |
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| Abstract: | The AKARI satellite (formerly known as ASTRO-F) is Japan’s first infrared astronomical satellite. AKARI is equipped with the infrared camera (IRC) and the far-infrared surveyor (FIS), which are cooled below 7 K. The AKARI’s 68.5 cm telescope, which is made of SiC, is also cooled below 7 K. A unique feature of the AKARI cryostat is that it uses both cryogen and mechanical coolers. Using mechanical coolers, the helium lifetime can be greater than one year with 170 L of liquid helium. AKARI was launched on February 21, 2006 (UT), from the Uchinoura Space Center (USC). It has been performing successfully in orbit. |
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