Progress in the Development of an H- Ion Source for Cyclotrons

被引:0
|
作者
Etoh, H. [1 ]
Aoki, Y. [1 ]
Mitsubori, H. [1 ]
Arakawa, Y. [1 ]
Kato, T. [1 ]
Sakuraba, J. [1 ]
Mitsumoto, T. [1 ]
Yajima, S. [1 ]
Okumura, Y. [2 ]
机构
[1] Sumitomo Heavy Ind Ltd, Tokyo, Japan
[2] Japan Atom Energy Agcy, Fus Res & Dev Directorate, Aomori, Japan
关键词
D O I
10.1063/1.4916441
中图分类号
O59 [应用物理学];
学科分类号
摘要
A multi-cusp DC H- ion source has been developed for cyclotrons in medical use. Beam optics of the ET ion beam is studied using a 21) beam trajectory code. The simulation results are compared with the experimental results obtained in the Mark I source, which has produced up to 16 mA H- ion beams. The optimum extraction voltages show good agreement between the calculation and the experimental results. A new ion source, Mark II source, is designed to achieve the next goal of producing an H- beam of 20 mA. The magnetic field configurations and the plasma electrode design are optimized for Cs-seeded operation. Primary electron trajectory simulation shows that primary electrons are confined well and the magnetic litter prevents the primary electrons from entering into the extraction region.
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页数:5
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