First results of negative ion extraction with Cs for CRAFT prototype negative beam source

被引：6

作者：

Xie, Yahong ^{[1
]}

Hu, Chundong ^{[1
]}

Wei, Jianglong ^{[1
]}

Xu, Yongjian ^{[1
]}

Jiang, Caichao ^{[1
]}

Gu, Yuming ^{[1
]}

Zhao, Yuanzhe ^{[1
]}

Liang, Lizhen ^{[1
]}

Xie, Yuanlai ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China

来源：

PLASMA SCIENCE & TECHNOLOGY | 2021年 / 23卷 / 01期

关键词：

neutral beam injector; RF ion source; negative ion source; long pulse; Cs feeding; PLASMA SOURCES; DESIGN;

D O I：

10.1088/2058-6272/abc46b

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

In order to understand the physics and pre-study the engineering issues for radio frequency (RF) negative beam source, a prototype source with a single driver and three-electrode accelerator was developed. Recently, the beam source was tested on the RF source test facility with RF plasma generation, negative ion production and extraction. A magnetic filter system and a Cs injection system were employed to enhance the negative ion production. As a result, a long pulse of 105 s negative ion beam with current density of 153 A m(-2) was repeatedly extracted successfully. The source pressure is 0.6 Pa and the ratio of co-extracted electron and negative ion current is around 0.3. The details of design and experimental results of beam source were shown in this letter.

引用

页数：5

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