Interaction of electromagnetic waves with caustics in plasma flows.

Interaction of electromagnetic waves with caustics in plasma flows.
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DOI:
10.1103/physreve.78.056402
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发表时间:
2008-11
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
通讯作者:
A. .. Panchenko;T. Esirkepov;A. Pirozhkov;M. Kando;F. F. Kamenets-F.;S. V. Bulanov
A. .. Panchenko;T. Esirkepov;A. Pirozhkov;M. Kando;F. F. Kamenets-F.;S. V. Bulanov
中科院分区:
其他
文献类型:
--
作者:
A. .. Panchenko;T. Esirkepov;A. Pirozhkov;M. Kando;F. F. Kamenets-F.;S. V. Bulanov

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由于多普勒效应和非线性效应,电磁波与运动的带电粒子流奇点相互作用时,会发生反射、吸收和频率变化。在非均匀速度等离子体流中,由于非线性效应,在有限振幅朗缪尔波破碎过程中会出现与焦散线相对应的奇异性。系统地分析了电磁波的破碎机制和焦散线的形成,并计算了电磁波的反射系数。
An electromagnetic wave (EMW) interacting with the moving singularity of the charged particle flux undergoes the reflection and absorption as well as frequency change due to Doppler effect and nonlinearity. The singularity corresponding to a caustic in plasma flow with inhomogeneous velocity can arise during the breaking of the finite amplitude Langmuir waves due to nonlinear effects. A systematic analysis of the wave-breaking regimes and caustics formation is presented and the EMW reflection coefficients are calculated.