Characteristics of extracted ion beam from a cesium-free negative ion source using sheet plasma

Kaminaga H.; Takimoto T.; Tonegawa A.Sato K. N.

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Characteristics of extracted ion beam from a cesium-free negative ion source using sheet plasma

机译：Characteristics of extracted ion beam from a cesium-free negative ion source using sheet plasma

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We report the characteristics of extracted beam current in the test plasma produced by direct current for sheet plasma upgrade producing negative ions by volume production without cesium (Cs) seeding. The negative hydrogen ion beam is extracted by a two-grid extraction system, which is located at the periphery of the sheet plasma. Experimental observations show that (i) negative hydrogen ions are successfully extracted from the sheet plasma by single/multi-aperture grids and (ii) the ratio of the extracted electron current I-EG(e) and the hydrogen negative ion current I-EG(H-), I-EG(e)/I-c(H-), decreases from 8.0 to 2.0 with an increase in the height of the electron fence (H-EF), which is a filter that prevents electron diffusion from the extraction region.

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《Review of Scientific Instruments》 |2020年第11期|113302-1-113302-5|共5页
作者
Kaminaga H.; Takimoto T.; Tonegawa A.Sato K. N.;
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Tokai Univ, Grad Sch Sci, 4-1-1 Kitakaname, Hiratsuka, Kanagawa 2591292, Japan;

Tokai Univ, Grad Sch Sci & Technol, 4-1-1 Kitakaname, Hiratsuka, Kanagawa 2591292, Japan;

Tokai Univ, Dept Phys, 4-1-1 Kitakaname, Hiratsuka, Kanagawa 2591292, JapanTokyo Univ Sci, Shinjuku Ku, 1-3 Kagurazaka, Tokyo 1628601, Japan;

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Characteristics of extracted ion beam from a cesium-free negative ion source using sheet plasma

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