Arc discharge regulation of a megawatt hot cathode bucket ion source for the experimental advanced superconducting tokamak neutral beam injector.
Arc discharge of a hot cathode bucket ion source tends to be unstable what attributes to the filament self-heating and energetic electrons backstreaming from the accelerator. A regulation method, which based on the ion density measurement by a Langmuir probe, is employed for stable arc discharge operation and long pulse ion beam generation. Long pulse arc discharge of 100 s is obtained based on this regulation method of arc power. It establishes a foundation for the long pulse arc discharge of a megawatt ion source, which will be utilized a high power neutral beam injection device.
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China. xieyh@ipp.ac.cn
Yahong
Y
Xie
Chundong
C
Hu
Sheng
S
Liu
Caichao
C
Jiang
Jun
J
Li
Lizhen
L
Liang