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Plasma Sci. Technol. ›› 2018, Vol. 20 ›› Issue (2): 24003-024003.doi: 10.1088/2058-6272/aa8a5e

• 18届全国等离子体科学和技术会议 • 上一篇    下一篇

Study on the plasma generation characteristics of an induction-triggered coaxial pulsed plasma thruster

  

  • 收稿日期:2017-07-13 出版日期:2018-01-11 发布日期:2017-09-04

Study on the plasma generation characteristics of an induction-triggered coaxial pulsed plasma thruster

Weisheng CUI (崔伟胜)1, Wenzheng LIU (刘文正)1, Jia TIAN (田甲)1 and Xiuyang CHEN (陈修阳)2   

  1. 1 School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, People’s Republic of China 2 Rizhao Power Supply Company of State Grid Shandong Electric Power Company, Rizhao 276800, People’s Republic of China
  • Received:2017-07-13 Online:2018-01-11 Published:2017-09-04
  • Supported by:

    We thank National Natural Science Foundation of China (No. 51577011) and the Graduate Innovation Project of Beijing Jiaotong University (No. 2016YJS147) for the financial support of this work.

Abstract:

At present, spark plugs are used to trigger discharge in pulsed plasma thrusters (PPT), which are known to be life-limiting components due to plasma corrosion and carbon deposition. A strong electric field could be formed in a cathode triple junction (CTJ) to achieve a trigger function under vacuum conditions. We propose an induction-triggered electrode structure on the basis of the CTJ trigger principle. The induction-triggered electrode structure could increase the electric field strength of the CTJ without changing the voltage between electrodes, contributing to a reduction in the electrode breakdown voltage. Additionally, it can maintain the plasma generation effect when the breakdown voltage is reduced in the discharge experiments. The induction-triggered electrode structure could ensure an effective trigger when the ablation distance of Teflon increases, and the magnetic field produced by the discharge current could further improve the plasma density and propagation velocity. The induction-triggered coaxial PPT we propose has a simplified trigger structure, and it is an effective attempt to optimize the micro-satellite thruster.

Key words: pulsed plasma thruster, cathode triple junction, discharge characteristics, trigger structure

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