Electric potential near the extraction region in negative ion sources with surface produced negative ions

A. Fukano, A. Hatayama

研究成果: Conference contribution

5 被引用数 (Scopus)

抄録

The potential distribution near the extraction region in negative ion sources for the plasma with the surface produced negative ions is studied analytically. The potential is derived analytically by using a plasma-sheath equation, where negative ions produced on the Plasma Grid (PG) surface are considered in addition to positive ions and electrons. A negative potential peak is formed in the sheath region near the PG surface for the case of strong surface production of negative ions or for low energy negative ions. Negative ions are reflected by the negative potential peak near the PG and returned to the PG surface. This reflection mechanism by the negative potential peak possibly becomes a factor in negative ion extraction. It is also indicated that the potential difference between the plasma region and the wall decreases by the surface produced negative ions. This also has the possibility to contribute to the negative ion extraction.

本文言語English
ホスト出版物のタイトルSecond International Symposium on Negative Ions, Beams and Sources, NIBS2010
ページ68-77
ページ数10
DOI
出版ステータスPublished - 2011 10月 13
イベント2nd International Symposium on Negative Ions, Beams and Sources, NIBS2010 - Takayama City, Japan
継続期間: 2010 11月 162010 11月 19

出版物シリーズ

名前AIP Conference Proceedings
1390
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

Other

Other2nd International Symposium on Negative Ions, Beams and Sources, NIBS2010
国/地域Japan
CityTakayama City
Period10/11/1610/11/19

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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