向内发射同轴型二极管电流电压关系二维修正
2-D modification to the current-voltage correlation in inward-emitting coaxial diode
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摘要: 给出了对同轴型强流电子束二极管的电流电压关系进行的部分理论推导与介绍,同时利用PIC数值模拟以及实验研究得到的二维效应修正关系曲线。在研究中首先给出了对向内发射同轴型二极管在不同电压等级下的电流电压关系，然后用PIC数值模拟方法进行验证。对数值模拟的结果也给出了理论推导公式在不同状态下的二维效应修正因子与电子束流运动的特点。在研究中得到的电流电压关系理论公式基本上反映了不同条件下同轴型二极管的束流特性，所以此研究结果可以直接应用于包含同轴型二极管结构的脉冲功率器件的设计与实验结果的分析中，为实验中相关问题的解决提供设计的依据与理论分析基础。Abstract: The analytic formulary relations hips between current and voltage in inward-emitting coaxial diode are presented in this paper as well as the PIC numerical simulation and experim ental verification. Due to the 2-D effects, the analytic formulary can't exactly describe the characteristic of the current-voltage relationships in the diode. Hence, a numerical simulation code-KARAT is employed to study the 2-D effect s modification of this relation in different diode voltage level, and the modification coefficient vs. Different parameters are given. The intuitionistic pictures of the electron motion in the diode are also obtained. Meanwhile, the self-pinched current of inward-emitting coaxial diode is deduced. The experiment of coaxial diode was carried out on the SINUS-881 accelerator, and the
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Key words:
- intense current electron beam /
- diode /
- pulsed power
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