大气中固体燃烧等离子体与微波相互作用的实验研究
Experimental studies of the interaction of microwaves with mixture burning plasmas in the atmosphere
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摘要: 设计制造了含特定组分的化学药剂，利用热力学方法对其在大气中燃烧所产生的等离子体的电子密度进行了理论计算，对该等离子体对2~15 GHz波段微波的透射衰减和反射进行了测试。测试结果表明，该等离子体对该波段微波具有宽波段强吸收和弱反射性能，波段内的平均吸收大于25 dB，反射信号几乎淹没在背景噪声中。并从理论上分析了带电子与中性粒子的造成这一现象的主要原因是碰撞吸收。Abstract: A kind of chemical mixture is designed and prepared. With the method of thermodynamics, the average electron density of the plasma generated by burning the mixture is calculated. The reflection and attenuation of the microwaves, in the band of 2~15 GHz, by the plasma are measured. The results of measurements indicate that the plasma can absorb the energies of the microwaves in a broad band. The average absorption is above 25 dB, but the reflection is too weak to be distinguished from the background noise. Moreover, theoretical discussion indicates that the electron-neutral particle collision is the major factor that results in the absorption in the wide band.
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Key words:
- atmospheric pressure /
- burning plasmas /
- microwave /
- plasma cloaking /
- experimental study
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