衛星用熱制御FEPフィルムの低エネルギー電子ビーム照射による帯電特性と2次電子放出

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2012/09/01

タイトル(英語): Low Energy Electron Beam Induced Charging and Secondary Electron Emission Properties of FEP Film Used on Satellite Surfaces

著者名: 藤井　治久（(独) 国立高等専門学校機構 奈良工業高等専門学校 電気工学科），奥村　哲平（宇宙航空研究開発機構 研究開発本部），高橋　真人（宇宙航空研究開発機構 研究開発本部）

著者名(英語): Haruhisa Fujii (Department of Electrical Engineering, Nara National College of Technology), Teppei Okumura (Japan Aerospace Exploration Agency (JAXA)), Masato Takahashi (Japan Aerospace Exploration Agency (JAXA))

キーワード: 電子照射，帯電，熱制御材料，FEPフィルム，2次電子放出，体積抵抗率　　electron irradiation，charge-up，thermal control materials，FEP film，secondary electron emission，volume resistivity

要約(英語): Many kinds of insulating materials are used outside a spacecraft. Those are FEP films, polyimide films and so on, and are used as thermal control materials. These materials are exposed to charged particles environment around a spacecraft. So these materials charge up due to the charged particles, especially electrons. It is pointed out that charge-up on these materials is likely to cause discharges on the surfaces. From this viewpoint, we have investigated the charging potential characteristics of 127 μm thick FEP film, typical thermal control material, by irradiating electrons with various energies below 20 keV. In the dependence of the charging potential on the electron energy, we found that the electron energy at which no charge-up occurs is about 2.7 keV. It is thought to be the energy at which secondary electron emission yield becomes one. This indicates that electron irradiation to the FEP film with the energy lower than 2.7 keV induces positive charging. From the charge decay characteristics after electron irradiation the volume resistivity of the film was also obtained as a function of electric fields in the bulk of the FEP film.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.132 No.9 （2012） 特集：テラヘルツ波

本誌掲載ページ: 790-796 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/132/9/132_790/_article/-char/ja/