JAXA Repository / AIREX 未来へ続く、宙(そら)への英知

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title水星磁気圏探査機MMOの高温耐性太陽電池アレイの開発
Other TitleDevelopment of High-temperature-tolerant Solar Array for Mercury Magnetospheric Orbiter "MMO"
Author(jpn)豊田, 裕之; 嶋田, 貴信; 久木田, 明夫; 廣瀬, 和之; 田島, 道夫; 小川, 博之; 前島, 弘則; 早川, 基; 今泉, 充; 渡部, 浩一
Author(eng)Toyota, Hiroyuki; Shimada, Takanobu; Kukita, Akio; Hirose, Kazuyuki; Tajima, Michio; Ogawa, Hiroyuki; Maejima, Hironori; Hayakawa, Hajime; Imaizumi, Mitsuru; Watabe, Hirokazu
Author Affiliation(jpn)宇宙航空研究開発機構宇宙科学研究所 (JAXA)(ISAS); 宇宙航空研究開発機構宇宙科学研究所 (JAXA)(ISAS); 宇宙航空研究開発機構宇宙科学研究所 (JAXA)(ISAS); 宇宙航空研究開発機構宇宙科学研究所 (JAXA)(ISAS); 宇宙航空研究開発機構宇宙科学研究所 (JAXA)(ISAS); 宇宙航空研究開発機構宇宙科学研究所 (JAXA)(ISAS); 宇宙航空研究開発機構宇宙科学研究所 (JAXA)(ISAS); 宇宙航空研究開発機構宇宙科学研究所 (JAXA)(ISAS); 宇宙航空研究開発機構研究開発本部 (JAXA)(ARD); NEC東芝スペースシステム
Author Affiliation(eng)Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS); Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS); Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS); Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS); Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS); Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS); Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS); Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS); Aerospace Research and Development Directorate, Japan Aerospace Exploration Agency (JAXA)(ARD); NEC TOSHIBA Space Systems
Issue Date2011-05-17
PublisherInstitute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)
宇宙航空研究開発機構宇宙科学研究所
Publication title30th ISAS Space Energy Symposium
第30回宇宙エネルギーシンポジウム
Publication date2011-05-17
Languagejpn
eng
AbstractThis paper reports the development process of the solar array for the Mercury probe called the Mercury Magnetospheric Orbiter (MMO). Because the spacecraft is going be exposed to intense sunlight up to 11 suns, the temperature of the solar array is expected to reach as high as 230C. We evaluated the degradation in the electrical output of the solar cells by using high intensity and high temperature (HIHT) tests.Solar cells with coverglasses showed much larger degradation in the electrical output than expected by the degradation in the solar array for the Venus probe AKATSUKI after the HIHT test. In this test, the current output decreased, while the voltage output did not change.To diagnose the cause of the degradation, we tested each component of the solar cell separately. First, we subjected the DC93-500 adhesive, which attach the coverglasses on the solar cells, to the HIHT test, and found out that its transmittance decreased as irradiated by intense light at high temperature. The decrease in the transmittance decreased when more UV light was blocked. Then we illuminated the bare cells through the coverglasses which were held between the bare cells and the light source without using adhesive. After the test, neither the electrical performance of the bare cells nor the transmittance of the coverglasses decreased. Therefore, we concluded that the decreased transmittance of the coverglasses which was caused by the UV irradiation at high temperature led to the decrease in the current output.To minimize the decrease in the transmittance of the DC93-500 adhesive, we chose coverglasses of longer cut-on wavelength, resulting in decreased transmitted UV light. In addition to that, we chose 300-microm thick coverglasses instead of 100-microm ones.As a result, we successfully minimized the degradation in the electrical output of the solar cells to meet the requirement of the MMO.
DescriptionPhysical characteristics: Original contains color illustrations
Meeting Information: The thirtieth Space Energy Symposium (February 25, 2011. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS)), Sagamihara, Kanagawa Japan
Note: One CD-ROM
形態: カラー図版あり
会議情報: 第30回宇宙エネルギーシンポジウム(2011年2月25日, 宇宙航空研究開発機構宇宙科学研究所相模原キャンパス), 相模原市, 神奈川県
形態: CD-ROM1枚
Number of authors: 13
著者人数: 13人
Document TypeConference Paper
JAXA Categoryシンポジウム・研究会
NCIDAN10324356
SHI-NOAA0065107005
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/20501


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