Characteristics of a Large Diameter Radio-Frequency Negative Hydrogen Ion Source

被引：0
|
作者：
Sasaki, Yuko [1 ]
Takayama, Sho [1 ]
Nakano, Haruhisa [2 ]
Komuro, Atsushi [1 ]
Takahashi, Kazunori [1 ]
Ando, Akira [1 ]
机构：
[1] Tohoku Univ, Dept Elect Engn, 6-6-05 Aoba Yama, Sendai, Miyagi 9808579, Japan
[2] Natl Inst Fus Sci, 322-6 Oroshi, Toki, Gifu 5095292, Japan
来源：
PLASMA AND FUSION RESEARCH | 2016年 / 11卷
关键词：
RF ion source; NBI; ion source; negative hydrogen ion; FET-based inverter rf power supply;
D O I：
10.1585/pfr.11.2405088
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：
The characteristics of a 230-mm-diameter radio-frequency (rf) negative hydrogen ion source are investigated by the measurements of electron density and temperature. A hydrogen plasma is produced by an inductively coupled discharge operated with an rf frequency of 300 kHz and a power of a few tens of kW, where a field-effect-transistor-based inverter power supply is used as an rf generator. The ion source has a magnetic filter for reduction of the electron temperature near the plasma grid used for the extraction of a negative ion beam. A high electron density greater than 1018 m(-3) is successfully obtained for an operating gas pressure of 0.3 Pa. The electron temperature near the plasma grid is observed to decrease to about 1 eV with increasing magnetic field strength of the magnetic filter. (C) 2016 The Japan Society of Plasma Science and Nuclear Fusion Research
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页数：4
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