Characteristics of co-extracted electron beam current in sheet plasma-type cesium-free negative-ion source

被引：1

作者：

Kaminaga, Hiroki ^{[1
]}

Takimoto, Toshikio ^{[2
]}

Tonegawa, Akira ^{[1
,2
]}

Sato, Kohnosuke ^{[3
]}

机构：

[1] Tokai Univ, Grad Sch Sci, 4-1-1 Kitakaname, Hiratsuka, Kanagawa 2591292, Japan

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

[3] Tokyo Univ Sci, Shinjuku Ku, 1-3 Kagurazaka, Tokyo 1628601, Japan

来源：

FUSION ENGINEERING AND DESIGN | 2021年 / 168卷

关键词：

Neutral beam heating; Negative ion source; Cs-free; Volume production; Sheet plasma;

D O I：

10.1016/j.fusengdes.2021.112676

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

In this study, we designed a magnetized-sheet plasma produced by TPDsheet-U (Test plasma Produced by Direct current for sheet plasma upgrade) to produce and control negative hydrogen ions in plasma. A negative hydrogen ion (H-) is produced by volume production and extracted from the peripheral of the magnetized-sheet plasma by a two-grid system. This study represents the basic design of a single-aperture grid and the characteristics of the developed extraction system on TPDsheet-U. The reduction of the co-extraction electron current is a common and essential issue for the negative-ion source. Co-extracted electrons are successfully suppressed by setting a soft magnetic plate on plasma grid. We investigate herein the effects of the developed extraction system on the extracted H- and co-extracted electron beam current.

引用

页数：4