Characteristics of Hydrogen Negative Ion Source with FET based RF System

被引：5
|
作者：
Ando, A. [1 ]
Matsuno, T. [1 ]
Funaoi, T. [1 ]
Tanaka, N. [1 ]
Tsumori, K. [2 ]
Takeiri, Y. [2 ]
机构：
[1] Tohoku Univ, Sch Engn, Sendai, Miyagi 9808579, Japan
[2] Natl Inst Fus Sci, Toki, Gifu 5095292, Japan
来源：
SECOND INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES | 2011年 / 1390卷
基金：
日本学术振兴会;
关键词：
ion source; RF plasma; FET inverter; neutral beam injector; LARGE HELICAL DEVICE; HIGH-POWER; INJECTION; ITER;
D O I：
10.1063/1.3637402
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
Characteristics of radio frequency (RF) plasma production were investigated using a FET inverter power supply as a RF generator. High density hydrogen plasma was obtained using an external coil wound a cylindrical ceramic tube (driver region) with RF frequency of lower than 0.5MHz. When an axial magnetic field around 10mT was applied to the driver region, an electron density increased drastically and attained to over 10(19)m(-3) in the driver region. Effect of the axial magnetic field in driver and expansion region was examined. Lower gas pressure operation below 0.5Pa was possible with higher RF frequency. H- density in the expansion region was measured by using laser photo-detachment system. It decreased as the axial magnetic field applied, which was caused by the increase of energetic electron from the driver.
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页数：7
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