等离子体云团宽带电磁辐射源的实验研究
Experimental study on wideband electromagnetic radiation from plasma cloud
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摘要: 通过工质爆燃，产生了具有很宽频谱的电磁辐射。用4个宽带天线从不同方向对球形工质产生的电磁辐射进行了接收测量，并对信号作了频谱分析。实验结果表明：150 g工质爆炸产生的电磁脉冲持续时间为50 ns，上升沿很陡，频谱连续，频率范围为1～4 GHz，峰值频率为2 GHz，功率为2 W。对爆燃型工质产生电磁辐射的机理进行了初步理论探讨，认为等离子体辐射可能是产生电磁辐射的源。Abstract: A wideband spectrum of electromagnetic radiation from the special explosive which differs from high explosive has been measured. Four broadband antennas were employed to observe pulse electromagnetic radiation from a spherical explosive. The frequency spectra from these experiments were analyzed using time/frequency Fourier methods. The results show that the EM pulse from the explosive with mass of 150 g lasted 50 ns with a sharp rise. The radiation mechanisms for the phenomenon are theoretically discussed, in order to make it clear how the energy radiates. It is suggested plasma radiation might be the source of the electromagnetic radiation detected by the antennas.
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Key words:
- explosive /
- cold plasma /
- electromagnetic wave /
- wideband
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