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title水星磁気圏探査機MMO用太陽電池の高温高光強度環境下における耐性評価
Other TitleDurability Evaluation of Triple-Junction Solar Cells in High-Intensity and High-Temperature Environments for Mercury Magnetospheric Orbiter (MMO)
Author(jpn)嶋田, 貴信; 豊田, 裕之; 久木田, 明夫; 今泉, 充; 廣瀬, 和之; 田島, 道夫; 小川, 博之; 早川, 基; 岡本, 章; 野崎, 幸重
Author(eng)Shimada, Takanobu; Toyota, Hiroyuki; Kukita, Akio; Imaizumi, Mitsuru; Hirose, Kazuyuki; Tajima, Michio; Ogawa, Hiroyuki; Hayakawa, Hajime; Okamoto, Akira; Nozaki, Yukishige
Author Affiliation(jpn)宇宙航空研究開発機構宇宙科学研究本部; 宇宙航空研究開発機構宇宙科学研究本部; 宇宙航空研究開発機構宇宙科学研究本部; 宇宙航空研究開発機構研究開発本部; 宇宙航空研究開発機構宇宙科学研究本部; 宇宙航空研究開発機構宇宙科学研究本部; 宇宙航空研究開発機構宇宙科学研究本部; 宇宙航空研究開発機構宇宙科学研究本部; 日本電気; NEC東芝スペース
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); Aerospace Research and Development Directorate, Japan Aerospace Exploration Agency (JAXA); 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); NEC; NEC TOSHIBA Space Systems
Issue Date2010-02
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本部
Publication titleSpace Energy Symposium
宇宙エネルギーシンポジウム
Volume29
Publication date2010-02
Languagejpn
eng
AbstractThe Japan Aerospace Exploration Agency (JAXA) has been developing Mercury Magnetospheric Orbiter (MMO), which is Japanese part of the BepiColombo mission launched in 2014. During its mission around Mercury, the spacecraft will be exposed to high solar irradiance of up to 11 suns, with an estimated maximum solar panel temperature of 230C. In such an environment, solar cells are required to operate under high intensity and high temperature (HIHT) conditions. Therefore, it is essential to evaluate the durability of solar cells to meet the power requirements throughout the mission life. We conducted continuous operation tests under HIHT conditions to examine the validity of the solar array configuration at the Institute of Space and Astronautical Science (ISAS) of JAXA, using an interior planetary thermal vacuum chamber. In this paper, we describe the durability tests and the design of solar cells for the MMO.Our HIHT tests clarified the following facts: (i) Transparency of the coverglass (CG) and the performance of the solar cells do not degrade and (ii) transparency of the DC93-500 adhesive in the top cell response region degrades mainly due to ultraviolet exposure at high temperatures. Therefore, we decided to use conductive AR0213 CGs (from JDSU) with a thickness of 300 microm, which have a longer cut-on wavelength in ultraviolet region. With this configuration, the predicted decrease in Pmax due to the HIHT environment is 17.3%. The change of the CG thickness from 100microm to 300microm also decreases radiation degradation from 15.9% to 11.0% The array configuration of three strings on one panel and four strings on the remaining seven panels is required to meet the minimum power consumption at EOL. Our new design will offer the available power at EOL of 394.2 W, which is 46.7 W greater than the required power of 347.5 W.
DescriptionOriginal contains color illustrations
Meeting Information: The twenty-ninth Space Energy Symposium (February 26, 2010, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara)
形態: カラー図版あり
会議情報: 第29回宇宙エネルギーシンポジウム(2010年2月26日, 宇宙航空研究開発機構宇宙科学研究本部相模原キャンパス)
形態: CD-ROM1枚
Note: One CD-ROM
Document TypeConference Paper
JAXA Categoryシンポジウム・研究会
NCIDAN10324356
SHI-NOAA0064737002
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/16473


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