Characteristics of co-extracted electron beam current in sheet plasma-type cesium-free negative-ion source
Characteristics of co-extracted electron beam current in sheet plasma-type cesium-free negative-ion source
复制标题
片状等离子体型无铯负离子源共引出电子束电流特性
DOI：
10.1016/j.fusengdes.2021.112676
复制
发表时间：
2021
影响因子：
1.7
通讯作者：
Sato Kohnosuke
中科院分区：
文献类型：
--
作者：
Kaminaga Hiroki;Takimoto Toshikio;Tonegawa Akira;Sato Kohnosuke
本研究设计了一种由TPDsheet-U（Test plasma Produced by Direct current for sheet plasma upgrade）产生的磁化片状等离子体，用于产生和控制等离子体中的负氢离子。负氢离子（H-）通过批量生产产生，并通过双栅极系统从磁化片等离子体的外围提取。这项研究代表了一个单一的孔栅的基本设计和开发的提取系统的TPDsheet-U的特点。降低共提取电子电流是负离子源常见且重要的问题。通过在等离子体栅极上设置软磁板，成功地抑制了共引出电子。我们在这里调查的extractedH-和共同提取的电子束电流上开发的提取系统的效果。
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 extractedH−and co-extracted electron beam current.