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Article Dans Une Revue Plasma Physics Reports Année : 2009

On the minimal set of plasma parameters to determine the dispersion law of electron whistler waves

B. V. Lundin
  • Fonction : Auteur
C. Krafft

Résumé

The minimal sufficient set of plasma parameters is presented to describe the dispersion properties of electron whistler waves (helicons) in a wide frequency range above the ion cutoff frequency, provided that the wave frequency is significantly lower than the electron plasma frequency. When the gyrofrequency of the lightest ions is much higher than those of heavier ions, it is sufficient to know the relative content of the lightest ions, the highest ion cutoff frequency, the lower hybrid resonance frequency, and the electron gyro- and plasma frequencies. In this case, the frequency of electron whistler waves is determined by the upper root of the biquadratic equation derived, whereas the lower root corresponds to a resonant mode with its refractive index increasing when the frequency tends toward the highest ion gyrofrequency from below. The developed approach is also efficient in plasmas containing a substantial amount of negative ions and/or heavy dust particulates. The accuracy of the approximate solution of the total cold plasma dispersion relation is illustrated graphically.

Dates et versions

hal-01553797 , version 1 (03-07-2017)

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B. V. Lundin, C. Krafft. On the minimal set of plasma parameters to determine the dispersion law of electron whistler waves. Plasma Physics Reports, 2009, 35 (6), pp.502-509. ⟨10.1134/S1063780X09060075⟩. ⟨hal-01553797⟩
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