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Development of a Variable Emittance Radiator, 1999
ISSN: 0148-7191, e-ISSN: 2688-3627
Published July 12, 1999 by SAE International in United States
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The Smart Radiation Device (SRD) is a thin and light tile whose infrared emissivity is varied proportionally by the temperature of the radiator. Bonded only to the external surface of the spacecraft’s instruments, it controls the heat radiated to deep space without electrical or mechanical instruments used for changing emissivity. Its function is similar to the thermal louver which has been used for a lot of spacecraft, but the SRD is lighter than it. Thus, by using this new device, we can control the temperature of the instruments on the spacecraft more easily. The materials of the SRD are La0.825Sr0.175MnO3 and La0.7Ca0.3MnO3.
In this paper, design and preliminary test results of the SRD will be presented. The optical properties for the materials of the SRD, such as the total hemispherical emittance and the solar absorptance, have been measured. In addition the degradation by protons has been investigated.
- Sumitaka Tachikawa - The Institute of Space and Astronautical Science
- Akira Ohnishi - The Institute of Space and Astronautical Science
- Kazunori Shimazaki - Keio Univ.
- Akira Okamoto - NEC Corp.
- Yasuyuki Nakamura - NEC Corp.
- Yuichi Shimakawa - NEC Corp.
- Takashi Manako - NEC Corp.
- Toru Mori - NEC Corp.
- Atsushi Ochi - NEC Corp.
CitationTachikawa, S., Ohnishi, A., Shimazaki, K., Okamoto, A. et al., "Development of a Variable Emittance Radiator, 1999," SAE Technical Paper 1999-01-2090, 1999, https://doi.org/10.4271/1999-01-2090.
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