Influence of grid on the extraction characteristics of different charged ions in mixed ion beams

doi:10.1088/1674-1056/add4e0

Abstract The extraction characteristics of multi-charged ions produced by ion sources are important for some useful applications. In this paper, the extraction process of Cu$^{+}$, Cu$^{2+}$, Cu$^{3+}$, and Cu$^{4+}$ mixed ions is simulated by setting ideal physical parameters in a two-dimensional particle-in-cell (PIC) code, and the evolution characteristics of density and velocity distributions of different charged ions during plasma (density about 10$^{15}$ m$^{-3}$) motion and extraction are presented. Besides, the effects of grid thickness and grid aperture on the motion behavior of different charged ions and the extracted ion current are analyzed. The results showed that the ion diffusion increases with the increase of the ion charge, and higher charged ions are more likely to be affected by the grid. This provides support for further understanding of the extraction characteristics of multi-charged mixed ion beams.

Keywords: ion extraction grid multi-charged ion density distribution

Received: 26 February 2025
Revised: 09 April 2025
Accepted manuscript online: 07 May 2025

PACS:	52.65.-y	(Plasma simulation)
	52.65.Rr	(Particle-in-cell method)
	29.25.-t	(Particle sources and targets)
	29.25.Ni	(Ion sources: positive and negative)

Fund: Project supported by the Presidential Foundation of China Academy of Engineering Physics (Grant No. YZJJZQ2022016), and the National Natural Science Foundation of China (Grant No. 52207177).

Corresponding Authors: Ao Xu
E-mail: xuao@caep.cn

Cite this article:

Ao Xu(徐翱), Xiang Wan(万翔), and Pingping Gan(甘娉娉) Influence of grid on the extraction characteristics of different charged ions in mixed ion beams 2025 Chin. Phys. B 34 085202

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Influence of grid on the extraction characteristics of different charged ions in mixed ion beams

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