Particle‐in‐cell simulation of the incoherent scatter radar spectrum
Particle‐in‐cell simulation of the incoherent scatter radar spectrum
复制标题
非相干散射雷达频谱的粒子在细胞模拟
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
M. Zettergren
中科院分区：
文献类型：
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作者：
M. Díaz;J. Semeter;M. Oppenheim;M. Zettergren
提出了一种细胞内粒子（PIC）方法，并用于模拟非相干散射雷达（ISR）光谱。特别是，对处于热力学平衡状态的小型、未磁化的 F 区等离子体体积进行了二维模拟。将模拟结果与热力学平衡等离子体获得的分析 ISR 光谱进行比较，结果表明它们是一致的。尽管必须修改一些等离子体参数以限制计算成本，但通过模拟获得的物理结论可以保持不变。 PIC 方法可以扩展到研究扭曲的 ISR 光谱，以深入了解潜在的物理现象。该模拟还提供了一种研究光谱畸变随时间演化的方法，从而可以开发根据畸变光谱估计等离子体参数的程序。
A particle‐in‐cell (PIC) approach is presented and utilized to simulate incoherent scatter radar (ISR) spectra. In particular, a two‐dimensional simulation is performed of a small, unmagnetized, F region plasma volume in thermodynamic equilibrium. The simulation results are compared to the analytical ISR spectra obtained for a plasma in thermodynamic equilibrium, and they are shown to be in agreement. Even though some plasma parameters have to be modified to limit the computational cost, the physical conclusions obtained by simulation can remain unaltered. The PIC approach can be extended to study distorted ISR spectra to obtain insights into the underlying physical phenomena. This simulation also provides a means for studying the time evolution of spectral distortions, which could enable the development of procedures for estimating plasma parameters from distorted spectra.