Optimization and numerical simulation for the extraction system of the H<SUP>-</SUP> multicusp ion source

M. Hosseinzadeh; H. Afarideh

doi:10.1088/1674-1137/38/5/057003

Chinese Physics C> 2014, Vol. 38> Issue(5) : 057003 DOI: 10.1088/1674-1137/38/5/057003

Optimization and numerical simulation for the extraction system of the H^- multicusp ion source

M. Hosseinzadeh ^, ,
H. Afarideh ^,

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A new ion source has been designed and manufactured for the CYCLONE30 accelerator, which has a much advanced performance compared with the original. It is expected that the newly designed ion source extraction system will transport a very large percentage of the beam without deteriorating the beam optics, which is designed to deliver an H^- beam at 30 keV. The accelerator assembly consists of three circular aperture electrodes made of copper. The simulation study was focused on finding parameter sets that raise the beam perveance as large as possible and which reduce the beam divergence as low as possible. Ion beams of the highest quality are extracted whenever the half-angular divergence is minimum, for which the perveance current intensity and the extraction gap have optimum values. The triode extraction system is designed and optimized by using CST software (for Particle Beam Simulations). The physical design of the extraction system is given in this paper. From the simulation results, it is concluded that it is possible to achieve this goal by decreasing the thickness of the plasma electrode, shortening the first gap, and adjusting the acceleration electrode voltage.

References

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M. Hosseinzadeh and H. Afarideh. Optimization and numerical simulation for the extraction system of the H^- multicusp ion source[J]. Chinese Physics C, 2014, 38(5): 057003. doi: 10.1088/1674-1137/38/5/057003

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Optimization and numerical simulation for the extraction system of the H^- multicusp ion source

Corresponding author: M. Hosseinzadeh,

Corresponding author: H. Afarideh,

Received Date: 2013-05-30

Accepted Date: 1900-01-01

Available Online: 2014-05-05

Abstract: A new ion source has been designed and manufactured for the CYCLONE30 accelerator, which has a much advanced performance compared with the original. It is expected that the newly designed ion source extraction system will transport a very large percentage of the beam without deteriorating the beam optics, which is designed to deliver an H^- beam at 30 keV. The accelerator assembly consists of three circular aperture electrodes made of copper. The simulation study was focused on finding parameter sets that raise the beam perveance as large as possible and which reduce the beam divergence as low as possible. Ion beams of the highest quality are extracted whenever the half-angular divergence is minimum, for which the perveance current intensity and the extraction gap have optimum values. The triode extraction system is designed and optimized by using CST software (for Particle Beam Simulations). The physical design of the extraction system is given in this paper. From the simulation results, it is concluded that it is possible to achieve this goal by decreasing the thickness of the plasma electrode, shortening the first gap, and adjusting the acceleration electrode voltage.

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Optimization and numerical simulation for the extraction system of the H^- multicusp ion source

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Optimization and numerical simulation for the extraction system of the H- multicusp ion source

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Optimization and numerical simulation for the extraction system of the H^- multicusp ion source

Optimization and numerical simulation for the extraction system of the H^- multicusp ion source