Electromagnetic pulse emission by plasma oscillations from Z pinches
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摘要: 从理论上研究了Z箍缩过程中单模的等离子体振荡引起的电磁脉冲辐射。当模式扰动的相速度大于真空中的光速时，电磁脉冲辐射具有类似于切伦科夫辐射的角分布特征，并且随着相速度的增大这种定向辐射特征越显著；不同波长的电磁辐射也具有不同的角分布特征，短波长的电磁脉冲具有更好的定向性。电磁辐射功率强烈依赖于电子的等离子体振荡频率和等离子体柱的半径。Abstract: Electromagnetic pulse emission produced by single mode plasma oscillations from Z pinches is theoretically studied. The angular distribution of electromagnetic pulse is similar with that of Cerenkov radiation when the phase velocity is superluminal, and the larger the phase velocity is, the more obvious the directional radiation; electromagnetic pulse with shorter wavelength has narrower distribution. The radiation power strongly depends plasma oscillation frequency of electrons and radius of plasma column.
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Key words:
- Z-pinch /
- electromagnetic pulse /
- plasma oscillation /
- Cerenkov radiation
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