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In the DMF configuration, the energetic electrons are trapped by the mirror of a magnetic multicusp field, and only the thermal electrons are present in the center of the arc chamber. A large amount of H^- ions of more than 1 x 10^12 cm^-3 are produced in the center region. The electron current extracted with the H^- ions can be suppressed by a magnetic filter field in front of a plasma grid without affecting the H^- ion current. The experimental data obtained in the DMF configuration are compared with those obtained in a single-magnetic filter (SMF) configuration. In the SMF configuration, the energetic electrons are present in the center region, and the magnetic filter in front of a plasma grid reduces the electron density and temperature, which results in the reduction of the H^- ion current as well as the electron current. 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Production of Negative Hydrogen Ions in a Large Multicusp Ion Source with Double-Magnetic Filter Configuration
http://hdl.handle.net/10655/3211
http://hdl.handle.net/10655/32117a28b404-50a7-42b9-ad3f-75017c7f3446
Item type | 研究報告書 / Research Paper(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2010-02-05 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Production of Negative Hydrogen Ions in a Large Multicusp Ion Source with Double-Magnetic Filter Configuration | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | negative ion source | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | H^- ion source | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | NBI | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | volume production | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | magnetic filter | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | photodetachment | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_18ws | |||||
資源タイプ | research report | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
"Ando, A.
× "Ando, A.× Takeiri, Y.× Kaneko, O.× Oka, Y.× Wada, M.× Kuroda, T." |
|||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | "The production of the negative hydrogen ions in a large multicusp ion source has been investigated in a double-magnetic filter (DMF) configuration. In the DMF configuration, the energetic electrons are trapped by the mirror of a magnetic multicusp field, and only the thermal electrons are present in the center of the arc chamber. A large amount of H^- ions of more than 1 x 10^12 cm^-3 are produced in the center region. The electron current extracted with the H^- ions can be suppressed by a magnetic filter field in front of a plasma grid without affecting the H^- ion current. The experimental data obtained in the DMF configuration are compared with those obtained in a single-magnetic filter (SMF) configuration. In the SMF configuration, the energetic electrons are present in the center region, and the magnetic filter in front of a plasma grid reduces the electron density and temperature, which results in the reduction of the H^- ion current as well as the electron current. The extracted electron current and the optimum gas pressure for the H^- ion current are lower in the DMF configuration than those in the SMF configuration." | |||||
書誌情報 |
en : Research Report NIFS-Series 発行日 1992-05-01 |
|||||
報告書番号 | ||||||
NIFS-149 | ||||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0915-633X |