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<p>The nonlinear dynamics of bi-electronic streaming instability (BSI) is investigated in lunar plasma environments using the nonlinear WKB method. It is seen that the considered instability saturation is governed by a standard form of the Korteweg-de Vries (KdV) equation. It has a unique set of multiparametric nonlinear convective and linear dispersive coefficients. We semi-analytically reveal the instability saturation, principally in diverse solitary wave forms, alongside their basic conservation laws, in a broader perspective horizon. The sensitive frame velocity-dependency of the derived rarefactive solitary structures is illustrated, alongside the streaming velocity effects. It is interestingly found that such wave-spectral patterns completely disappear for a particular value of the relative streaming velocity (frame-flow equalisation). This study fairly maps the investigated nonlinear BSI saturation amongst the <i>Kaguya</i>-observed electrostatic solitary waves (ESWs) observationally reported elsewhere.</p>

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Nonlinear electronic streaming instability in lunar plasmas

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月23日

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  • Partha Pratim Deka,
  • Pralay Kumar Karmakar,
  • Ahmed Atteya

摘要

The nonlinear dynamics of bi-electronic streaming instability (BSI) is investigated in lunar plasma environments using the nonlinear WKB method. It is seen that the considered instability saturation is governed by a standard form of the Korteweg-de Vries (KdV) equation. It has a unique set of multiparametric nonlinear convective and linear dispersive coefficients. We semi-analytically reveal the instability saturation, principally in diverse solitary wave forms, alongside their basic conservation laws, in a broader perspective horizon. The sensitive frame velocity-dependency of the derived rarefactive solitary structures is illustrated, alongside the streaming velocity effects. It is interestingly found that such wave-spectral patterns completely disappear for a particular value of the relative streaming velocity (frame-flow equalisation). This study fairly maps the investigated nonlinear BSI saturation amongst the Kaguya-observed electrostatic solitary waves (ESWs) observationally reported elsewhere.