太赫兹波入射到高温等离子体的特性研究

Characteristics of Terahertz Wave Propagatingin High-Temperature Plasma

针对高温等离子体对太赫兹波的传输特性,采用单层介质矩阵传输模型的求解方法,研究太赫兹在等离子体电子密度、厚度、外加磁场强度和温度影响下的变化规律。数值分析结果发现,不同条件下高温等离子体对太赫兹波产生的传输特性不同,等离子体电子密度和厚度越大,反射率越大,透射率越小;外加磁场可以改善衰减情况,因此等离子体电子密度越小,厚底越小,温度越高,对穿过电磁波的影响越小,通过调节外加磁场的大小,避开衰减峰值,可以缓解通信“黑障”现象。

A single-layer dielectric matrix transmission model was developed to study the transmission characteristics of terahertz waves in high temperature plasma.The variation in the terahertz wave under the influences of plasma electron density,thickness,applied magnetic field strength,and temperature was studied.The numerical analysis results indicate that under different conditions,the high-temperature plasma exhibits different transmission characteristics for the incident wave.The reflectivity increases and transmittance decreases with increasing plasma-electron density and thickness;then,a magnetic field can be used to improve the attenuation.Therefore,the thickness decreases with decreasing electron density of the plasma,and the influence of the increasing temperature on electromagnetic waves decreases.Adjusting the magnitude of the applied magnetic field and avoiding the attenuation peak can prevent communication blackouts.