Numerical study of oblique incidence of terahertz wave to magnetized plasma
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摘要: 针对“黑障”问题，借助于电磁波斜入射到磁化等离子体的传输模型，研究了太赫兹(THz)波在磁化、均匀等离子体中的传输特性，分析了太赫兹波在磁化等离子体中传播的反射、透射以及衰减。仿真结果表明，等离子体碰撞频率、电子密度、入射角度以及磁场强度，对衰减产生不同的影响。单纯的增加碰撞频率，衰减值呈现出先增大后减小的变化趋势；电子密度的增加，与衰减峰值的大小有关；外加磁场加入，衰减值降低。通过调节外加恒定磁场，可以有效地解决“黑障”问题。Abstract: With regard to "blackout" problems in aircraft, the transmission characteristics of terahertz (THz) waves in magnetized and homogeneous plasma were studied. Within the established framework of the electromagnetic wave which is inclined to the magnetized plasma transfer model, we compared different performances of terahertz waves in the magnetized plasma, by changing the reflection, the transmission, and the attenuation of their transmission. The simulation results show that the plasma collision frequency, electron density, incident angle and magnetic field intensity have different effects on attenuation. The attenuation value increases at first then decreases when the collision frequency is simply increased. The increase of electron density increases the peak value of the attenuation. Attenuation value decreases with addition of external magnetic field. Thus the "blackout" problem can be effectively solved by applying constant external magnetic field.
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Key words:
- terahertz wave /
- magnetization /
- plasma /
- blackout /
- attenuation
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图 2 太赫兹波的传输特性随碰撞频率的变化
Figure 2. THz wave propagation properties vary with collision frequency
图 4 太赫兹波的传输特性随磁场强度的关系
Figure 4. THz wave propagation properties vary with magnetic field intensity
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