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Abstract <p>Distribution functions of background ions perturbed by the ion-acoustic solitons are calculated using the Sagdeev pseudopotential approach for the case of cold ions. Velocity and kinetic-energy distribution functions are analyzed. Explicit expressions valid for the solitons of arbitrary amplitude are obtained. It is demonstrated that the solitons form a strongly nonequilibrium plasma in their vicinity. The results are compared with previous analytical calculations and results of simulations.</p>

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Ion Velocity and Energy Distribution Functions Perturbed by the Ion-Acoustic Solitons: Analytical Calculation for Arbitrary Amplitudes

  • 期刊论文

  • 发表日期：

    2025年1月1日

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  • F. M. Trukhachev,
  • M. M. Vasiliev,
  • O. F. Petrov

摘要

Abstract

Distribution functions of background ions perturbed by the ion-acoustic solitons are calculated using the Sagdeev pseudopotential approach for the case of cold ions. Velocity and kinetic-energy distribution functions are analyzed. Explicit expressions valid for the solitons of arbitrary amplitude are obtained. It is demonstrated that the solitons form a strongly nonequilibrium plasma in their vicinity. The results are compared with previous analytical calculations and results of simulations.