Model for artificial ionospheric duct formation due to HF heating
Model for artificial ionospheric duct formation due to HF heating
复制标题
高频加热引起的人工电离层管道形成模型
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
G. Joyce
中科院分区：
文献类型：
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作者：
G. Milikh;A. Demekhov;K. Papadopoulos;A. Vartanyan;J. Huba;G. Joyce
由高功率HF波注入的强电子加热可导致电离层等离子体密度扰动的形成，该扰动沿磁场线沿着延伸。这些密度扰动可以作为引导自然和人工ELF/VLF波的管道。本文提出了高频加热电离层形成波导的理论模型。该模型是基于修改后的SAMI 2代码，并通过比较两个有据可查的实验进行验证。在SURA加热设施进行的一项实验使用低轨道卫星DEMETER作为诊断工具，测量沿着靠近HF加热器磁天顶的飞越卫星轨道的电子和离子温度和密度。第二个实验在EISCAT高频设施进行，由EISCAT非相干散射雷达进行诊断，测量了150-600公里之间电子和离子温度的垂直分布。该模型与观测结果吻合较好，并提供了一个新的理解电离层的修改过程。
Strong electron heating by the injection of highly powerful HF waves can lead to the formation of ionospheric plasma density perturbations that stretch along the magnetic field lines. Those density perturbations can serve as ducts for guiding natural and artificial ELF/VLF waves. This paper presents a theoretical model of duct formation due to HF heating of the ionosphere. The model is based on the modified SAMI2 code, and is validated by comparison with two well documented experiments. One experiment, conducted at the SURA heating facility, used the low orbit satellite DEMETER as a diagnostic tool to measure the electron and ion temperature and density along the overflying satellite orbit close to the magnetic zenith of the HF‐heater. The second experiment, conducted at the EISCAT HF facility and diagnosed by the EISCAT Incoherent Scatter Radar, measured the vertical profiles of the electron and ion temperature between 150–600 km. The model agrees well with the observations, and provides a new understanding of the processes during ionospheric modification.