Physical Picture for the Anomalous Propagation of Ordinary Electromagnetic Waves in a plasma

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概要

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• It is shown that the physical mechanism for the "anomalous" propagation of electromagnetic waves at frequencies below the plasma frequency, noted by several authors, is due to the deflection of particles thermal motion by the wave magnetic field, leading to a density perturbation which can be large when enhanced by some resonance. In presence of an external magnetic field, B__∿_o, cyclotron resonance provides the enhancement for ordinary waves (E__∿‖B__∿_o). When B__∿_o=0,a wave-particle resonance can occur, again giving rise to "anomalous" propagation, if the velocity distribution is anisotropic with respect to the wave vector k__∿, which allows "slow" electromagnetic waves, with phase velocity less than the velocity of light. The Weibel instability, which also occurs with such a distribution function, relies upon the same physical mechanism.

• 核融合科学研究所の論文

著者

• Fried Burton

  Research Information Center Institute Of Plasma Physics Nagoya University:department Of Physics Univ

関連論文

• On the Nonlinear Schrodinger Equation for Langmuir Waves
• Physical Picture for the Anomalous Propagation of Ordinary Electromagnetic Waves in a plasma

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