...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Numerical modeling of artificial ionospheric layers driven by high-power HF heating
【24h】

Numerical modeling of artificial ionospheric layers driven by high-power HF heating

机译：数值模拟的人工电离层层驱动大功率高频加热

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We present a multi-scale dynamic model for the creation and propagation of artificial plasma layers in the ionosphere observed during high-power high-frequency (HF) heating experiments at HAARP. Ordinary (O) mode electromagnetic (EM) waves excite parametric instabilities and strong Langmuir turbulence (SLT) near the reflection point. The coupling between high-frequency electromagnetic and Langmuir waves and low-frequency ion acoustic waves is numerically simulated using a generalized Zakharov equation. The acceleration of plasma electrons is described by a Fokker-Planck model with an effective diffusion coefficient constructed using the simulated Langmuir wave spectrum. The propagation of the accelerated electrons through the non-uniform ionosphere is simulated by a kinetic model accounting for elastic and inelastic collisions with neutrals. The resulting ionization of neutral gas increases the plasma density below the acceleration region, so that the pump wave is reflected at a lower altitude. This leads to a new turbulent layer at the lower altitude, resulting in a descending artificial ionized layer (DAIL), that moves from near 230km to about 150km. At the terminal altitude, ionization, recombination, and ambipolar diffusion reach equilibrium, so the descent stops. The modeling results reproduce artificial ionospheric layers produced for similar sets of parameters during the high-power HF experiments at HAARP.
机译：提出了一种多尺度动态模型创造和传播的人工等离子体层在电离层观测大功率高频(HF)加热在HAARP实验。电磁(EM)波激发参数不稳定和强朗缪尔动荡(SLT)在反射点附近。高频电磁和之间朗缪尔波和低频离子声波波数值模拟使用广义Zakharov方程。等离子体电子的描述福克尔普朗克模型与一个有效的扩散使用模拟系数构造朗缪尔波谱。加速电子通过不均匀电离层动力学模型模拟占弹性和非弹性碰撞中性色。中性的气体增加下面的等离子体密度加速区域,泵波反映在一个较低的高度。新的湍流层高度越低,导致下行人工电离层(打),从附近约230公里150公里。重组和双极性扩散范围平衡,所以下降停止。结果人工繁殖电离层层在生产类似的参数HAARP的大功率高频实验。

著录项

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号