Generation and propagation characteristics of vacuum pulse discharge metal plasma
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摘要: 研究了采用放电电流为200 A,持续时间为13 s的单脉冲放电形式,在锥-板、锥-网两种电极结构下,等离子体生成及空间传播特性并使用探针法对生成等离子体的电子密度、电子温度、空间电位、离子能量等参数进行了测量。实验和仿真结果表明;锥-网电极的起始放电电压较高,生成的等离子密度较大,沿放电电极轴方向运动的等离子体的密度最大。然而,两种不同电极结构生成的等离子体的传播速度没有明显区别。Abstract: This paper investigates the generation and spatial propagating properties of vacuum discharge plasma with cone-plate and cone-mesh electrode configurations. Under the condition of single pulse discharge where the discharge current is 200 A and the discharge duration is 13 s, the property parameters of the generated plasma, such as electron density, electron temperature, space potential, and ions energy, are measured by the probe method. The experiment and simulation results show that the initial voltage of the cone-mesh electrode configuration is higher and the density of the generated plasma is larger. Moreover, the plasma moving along the axial direction of the electrodes possesses the largest density. However, the propagation velocities of the plasmas generated by the two kinds of electrode configurations show no apparent difference.
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Key words:
- vacuum /
- plasma /
- probe method /
- propagation property
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