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<p>In this study, we examine large-amplitude ion-acoustic (IA) solitary waves (SWs) in unmagnetized, collisionless plasma. This plasma consists of inertial fluid ions, while non-Maxwellian positrons and electrons are noninertial. In our model, both positrons and electrons follow a <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10773_2025_6154_Article_IEq3.gif" Format="GIF" Height="10" Rendition="HTML" Resolution="72" Type="Linedraw" Width="13" /> </InlineMediaObject> <EquationSource Format="TEX">\(\kappa\)</EquationSource> </InlineEquation>-deformed Kaniadakis distribution. To analyze these large-amplitude IASWs, we reduce the fundamental equations to a single energy-balance-like equation using the Sagdeev pseudopotential (SP) approach. We also numerically discuss the conditions required for the existence of IASWs. Furthermore, we identify the regions where IASWs can occur based on key plasma parameters such as positron concentration, Mach number, temperature ratio, and the deformed parameter. We also examine how these parameters affect the Sagdeev potential and the soliton profile. This research is especially relevant to ongoing studies of generalized entropies in plasma physics.</p>

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Arbitrary Amplitude Ion-Acoustic Electrostatic Solitary Waves in Electron-Positron-Ion Plasma Having \(\kappa -\) Kaniadakis Distributed Species

  • 期刊论文

  • 发表日期：

    2025年10月7日

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  • Haifa A. Alyousef,
  • Muhammad Khalid,
  • C. G. L. Tiofack,
  • Sama F. Alarfj,
  • Abdul Kabir,
  • Samir A. El-Tantawy

摘要

In this study, we examine large-amplitude ion-acoustic (IA) solitary waves (SWs) in unmagnetized, collisionless plasma. This plasma consists of inertial fluid ions, while non-Maxwellian positrons and electrons are noninertial. In our model, both positrons and electrons follow a \(\kappa\) -deformed Kaniadakis distribution. To analyze these large-amplitude IASWs, we reduce the fundamental equations to a single energy-balance-like equation using the Sagdeev pseudopotential (SP) approach. We also numerically discuss the conditions required for the existence of IASWs. Furthermore, we identify the regions where IASWs can occur based on key plasma parameters such as positron concentration, Mach number, temperature ratio, and the deformed parameter. We also examine how these parameters affect the Sagdeev potential and the soliton profile. This research is especially relevant to ongoing studies of generalized entropies in plasma physics.