中国物理B ›› 2024, Vol. 33 ›› Issue (4): 45203-045203.doi: 10.1088/1674-1056/ad1820

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Influence of extraction voltage on electron and ion behavior characteristics

Ao Xu(徐翱), Pingping Gan(甘娉娉)†, Yuanjie Shi(石元杰), and Lei Chen(陈磊)   

  1. Institute of Electronic Engineering, China Academy of Engineering Physics, Mianyang 621999, China
  • 收稿日期:2023-10-25 修回日期:2023-12-15 接受日期:2023-12-22 出版日期:2024-03-19 发布日期:2024-04-01
  • 通讯作者: Pingping Gan E-mail:ganpingping@caep.cn
  • 基金资助:
    Project supported by Presidential Foundation of CAEP (Grant No. YZJJZQ2022016) and the National Natural Science Foundation of China (Grant No. 52207177).

Influence of extraction voltage on electron and ion behavior characteristics

Ao Xu(徐翱), Pingping Gan(甘娉娉)†, Yuanjie Shi(石元杰), and Lei Chen(陈磊)   

  1. Institute of Electronic Engineering, China Academy of Engineering Physics, Mianyang 621999, China
  • Received:2023-10-25 Revised:2023-12-15 Accepted:2023-12-22 Online:2024-03-19 Published:2024-04-01
  • Contact: Pingping Gan E-mail:ganpingping@caep.cn
  • Supported by:
    Project supported by Presidential Foundation of CAEP (Grant No. YZJJZQ2022016) and the National Natural Science Foundation of China (Grant No. 52207177).

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摘要： 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.

关键词: extraction voltage, plasma, ion beam, ion current

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.

Key words: extraction voltage, plasma, ion beam, ion current

中图分类号:  (Plasma simulation)

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