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Imran Ali KHAN, G MURTAZA. Effect of kappa distribution on the damping rate of the obliquely propagating magnetosonic mode[J]. Plasma Science and Technology, 2018, 20(3): 35302-035302. DOI: 10.1088/2058-6272/aaa457
Citation: Imran Ali KHAN, G MURTAZA. Effect of kappa distribution on the damping rate of the obliquely propagating magnetosonic mode[J]. Plasma Science and Technology, 2018, 20(3): 35302-035302. DOI: 10.1088/2058-6272/aaa457

Effect of kappa distribution on the damping rate of the obliquely propagating magnetosonic mode

  • Data from spacecrafts suggest that space plasma has an abundance of suprathermal particles which are controlled by the spectral index κ when modeled on kappa particle velocity distribution. In this paper, considering homogeneous plasma, the effect of integer values of κ on the damping rate of an obliquely propagating magnetosonic (MS) wave is studied. The frequency of the MS wave is assumed to be less than ion cyclotron frequency, i.e., w ω<<ωi. Under this assumption, the dispersion relation is investigated both numerically and analytically, and it is found that the real frequency of the wave is not a sensitive function of κ, but the imaginary part of the frequency is. It is also shown that for those values of κ where a large number of resonant particles participate in wave–particle interaction, the wave is heavily damped, as expected. The possible application of the results to the solar wind is discussed.
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