<RESEARCH REPORT>Comparison between Uramoto Type and Straight Filament Type Sheet Plasmas as a Volume Produced H^- Ion Source (I)
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概要
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The Uramoto type sheet plasma (transformed from a cylindrical plasma by two permanent magnets) and a long straight filament cathode type sheet plasma are compared as volume produced H^- ion sources. For a same discharge power (for example 5A×100V=500W), a H^- ion current density (2.5mA/cm^2) extracted from the Uramoto type sheet plasma, is above 20 times larger than that from the straight filament type (0.125mA/cm^2). As an essential difference between the two types, it is pointed out that the Uramoto type uses in combination of negative bias voltage on the metalic large vacuum chamber (surrounding the sheet plasma) and a cusp magnetic field produced by the two permanent magnets which are effective on the confinement of electrons and H^- ions. A pressure gradient discharge of the ordinary Uramoto type is not essential for volume production of H^- ions, but is very useful to reduce the optimum pressure.
- 核融合科学研究所の論文
著者
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Uramoto Joshin
Research Information center, Institute of Plasma Physics, Nagoya University
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Uramoto Joshin
Research Information Center Institute Of Plasma Physics Nagoya University
関連論文
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- Comparison between Uramoto Type and Straight Filament Type Sheet Plasma as a Volume Produced H^- Ion Source (II)
- Simple Method of Sheet Plasma Production in Lower Pressure
- Extraction of Volume Produced H^- or D^- Ions from a Sheet Plasma I
- Extraction of Volume Produced H^- or D^- Ions from a Sheet Plasma II
- Comparison between Uramoto Type and Straight Filament Type Sheet Plasmas as a Volume Produced H^- Ion Source (I)
- An Ion Source Plasma starting from a cold La B_6 cathode I
- Electron Temperature Effects for An Ion Beam Source