同轴强流双环形阴极的发射特性分析

提出了一种同轴双环形阴极结构二极管，并进行理论求解和仿真研究，得到了双环形阴极二极管中，内外环上场强一致时二极管内尺寸分布关系。并采用粒子仿真软件进行了双环形阴极爆炸发射模拟研究，研究结果表明，双环形阴极发射束流由高压加载后初始时刻二极管内电场分布和内外环形阴极相互之间屏蔽作用的竞争结果决定。提出了两阴极相互之间屏蔽作用的经验公式，指出该相互屏蔽作用程度随发射总束流呈线性关系，随两阴极距离呈指数关系，最终采用粒子仿真软件进行了验证。

Abstract

In this paper, we present a new structure cathode named co-axis double annulus cathode. By modeling and solving the Laplace equation, we get the accurate distribution of potential in the diode, through which we have the connection of parameters to get the double annulus cathode emission simultaneously. The CHIPIC particle-in-cell software was used to a simulate the electrons explosive emission of the double annulus cathode with appropriate parameters. The result verifies that, the emitting current density of the double annulus cathode is determined by both the original E-field distribution in the diode and the screening effect between two cathodes. The screening effect factor of one cathode has a linear relationship with the beam emitted from the other cathode and an exponential relationship with the distance between the two cathodes.

参考文献

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李乐乐, 黄华, 刘振帮, 何琥, 袁欢. 同轴强流双环形阴极的发射特性分析[J]. 强激光与粒子束, 2017, 29(10): 103001. Li Lele, Huang Hua, Liu Zhenbang, He Hu, Yuan Huan. Emitting characteristics of co-axis double annulus cathode[J]. High Power Laser and Particle Beams, 2017, 29(10): 103001.

同轴强流双环形阴极的发射特性分析

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