Influence of extraction voltage on electron and ion behavior characteristics

doi:10.1088/1674-1056/ad1820

Abstract The characteristics of the extracted ion current have a significant impact on the design and testing of ion source performance. In this paper, a 2D in space and 3D in velocity space particle in cell (2D3V PIC) method is utilized to simulate plasma motion and ion extraction characteristics under various initial plasma velocity distributions and extraction voltages in a Cartesian coordinate system. The plasma density is of the order of 10¹⁵ m^-3—10¹⁶ m^-3 and the extraction voltage is of the order of 100 V—1000 V. The study investigates the impact of various extraction voltages on the velocity and density distributions of electrons and positive ions, and analyzes the influence of different initial plasma velocity distributions on the extraction current. The simulation results reveal that the main reason for the variation of extraction current is the space-charge force formed by the relative aggregation of positive and negative net charges. This lays the foundation for a deeper understanding of extraction beam characteristics.

Keywords: extraction voltage plasma ion beam ion current

Received: 25 October 2023
Revised: 15 December 2023
Accepted manuscript online: 22 December 2023

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 Presidential Foundation of CAEP (Grant No. YZJJZQ2022016) and the National Natural Science Foundation of China (Grant No. 52207177).

Corresponding Authors: Pingping Gan
E-mail: ganpingping@caep.cn

Cite this article:

Ao Xu(徐翱), Pingping Gan(甘娉娉), Yuanjie Shi(石元杰), and Lei Chen(陈磊) Influence of extraction voltage on electron and ion behavior characteristics 2024 Chin. Phys. B 33 045203

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Influence of extraction voltage on electron and ion behavior characteristics

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