研究了电离层加热激发受激布里渊散射效应.利用受激布里渊散射匹配条件,结合国际地磁场参考模型,模拟计算了离子声波(Ion Acoustic,IA)与静电离子回旋波(Electrostatic Ion Cyclotron,EIC)频率随地理纬度、加热频率、波束指向、电子温...研究了电离层加热激发受激布里渊散射效应.利用受激布里渊散射匹配条件,结合国际地磁场参考模型,模拟计算了离子声波(Ion Acoustic,IA)与静电离子回旋波(Electrostatic Ion Cyclotron,EIC)频率随地理纬度、加热频率、波束指向、电子温度等参数变化特性,并以我国海南与美国高频主动极光研究项目(High Frequency Active Auroral Research Program,HAARP)为例,研究IA与EIC频率随纬度的变化.模拟结果表明:随着纬度的增加,IA与EIC频率增大;与IA频率相比,EIC频率随加热频率、波束指向及电子温度的变化相对较小;随加热频率的增加高纬地区IA频率增大,而低纬地区基本不变;随加热波束指向从南到北变化,海南IA频率单调下降,HAARP则为先上升后下降的形态,EIC具有相反的变化;电子温度越高,IA与EIC频率越大.本文模拟结果可为我国将来开展同类实验提供参考.展开更多
By using the quantum magnetohydrodynamic model, the electrostatic waves in weakly magnetized quantum plasmas are investigated. The electrons are treated as a quantum and magnetized species, while the ions are classica...By using the quantum magnetohydrodynamic model, the electrostatic waves in weakly magnetized quantum plasmas are investigated. The electrons are treated as a quantum and magnetized species, while the ions are classical unmagnetized ones. The general dispersion relations are derived. It is shown that, both the high frequency electron waves （Langmuire wave and upper-hybrid wave） and the low frequency ion acoustic wave can propagate when the plasmas are cold.展开更多
文摘研究了电离层加热激发受激布里渊散射效应.利用受激布里渊散射匹配条件,结合国际地磁场参考模型,模拟计算了离子声波(Ion Acoustic,IA)与静电离子回旋波(Electrostatic Ion Cyclotron,EIC)频率随地理纬度、加热频率、波束指向、电子温度等参数变化特性,并以我国海南与美国高频主动极光研究项目(High Frequency Active Auroral Research Program,HAARP)为例,研究IA与EIC频率随纬度的变化.模拟结果表明:随着纬度的增加,IA与EIC频率增大;与IA频率相比,EIC频率随加热频率、波束指向及电子温度的变化相对较小;随加热频率的增加高纬地区IA频率增大,而低纬地区基本不变;随加热波束指向从南到北变化,海南IA频率单调下降,HAARP则为先上升后下降的形态,EIC具有相反的变化;电子温度越高,IA与EIC频率越大.本文模拟结果可为我国将来开展同类实验提供参考.
基金Supported by the National Natural Science Foundation of China under Grant Nos. 10905015 and 10747122the Foundation of Anhui Educational Committee under Grant No. 2009SQRZ010
文摘By using the quantum magnetohydrodynamic model, the electrostatic waves in weakly magnetized quantum plasmas are investigated. The electrons are treated as a quantum and magnetized species, while the ions are classical unmagnetized ones. The general dispersion relations are derived. It is shown that, both the high frequency electron waves （Langmuire wave and upper-hybrid wave） and the low frequency ion acoustic wave can propagate when the plasmas are cold.
