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<p>In order to examine the presence of arbitrary-amplitude dust-ion acoustic solitons, including supersolitons and double layers at sonic speed, in a collisionless five-component magnetized plasma, the energy integral obtained by applying the Sagdeev pseudo-potential approach. The plasma system includes a nonthermal hot positron species, two different populations of electrons at distinct temperatures, warm adiabatic ions, and negatively charged static dust grains. Positive potential supersolitons (PPSSs) and Positive potential solitary waves (PPSWs) are visible in the graphical analysis of the Sagdeev pseudo-potential, while the system supports negative potential double layers (NPDLs) and negative potential solitary waves (NPSWs) on the negative potential side. Consequently, we have seen that inside a certain domain <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\sigma _{sc}&gt;\sigma ^{c}_{sc}\)</EquationSource> </InlineEquation>, the amplitude of PPSW grows as <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\sigma _{sc}\)</EquationSource> </InlineEquation> increases, and then the amplitude of PPSW decreases with increasing <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(\sigma _{sc}\)</EquationSource> </InlineEquation>. We found that the amplitude of PPSW reduces as <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(n_{pc}\)</EquationSource> </InlineEquation>, <InlineEquation ID="IEq5"> <EquationSource Format="TEX">\(n_{sc}\)</EquationSource> </InlineEquation>, <InlineEquation ID="IEq6"> <EquationSource Format="TEX">\(\beta _{p}\)</EquationSource> </InlineEquation>, <InlineEquation ID="IEq7"> <EquationSource Format="TEX">\(\beta _{e}\)</EquationSource> </InlineEquation>, and <InlineEquation ID="IEq8"> <EquationSource Format="TEX">\(l_{z}\)</EquationSource> </InlineEquation> grow, but it increases with rising <InlineEquation ID="IEq9"> <EquationSource Format="TEX">\(\sigma _{pc}\)</EquationSource> </InlineEquation>. The effect of parameters on the amplitude of PPSSs and NPSWs has also been considered. We also used phase portrait analysis to examine the characteristics of the various nonlinear wave structures.</p>

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The Effects of Multi-Species Magnetized Plasma on Arbitrary Amplitude Dust-Ion Acoustic Solitary Structures at Sonic Speed

  • 期刊论文

  • 发表日期：

    2026年4月1日

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  • Paltu Halder,
  • Sandip Dalui,
  • Sankirtan Sardar,
  • Anup Bandyopadhyay

摘要

In order to examine the presence of arbitrary-amplitude dust-ion acoustic solitons, including supersolitons and double layers at sonic speed, in a collisionless five-component magnetized plasma, the energy integral obtained by applying the Sagdeev pseudo-potential approach. The plasma system includes a nonthermal hot positron species, two different populations of electrons at distinct temperatures, warm adiabatic ions, and negatively charged static dust grains. Positive potential supersolitons (PPSSs) and Positive potential solitary waves (PPSWs) are visible in the graphical analysis of the Sagdeev pseudo-potential, while the system supports negative potential double layers (NPDLs) and negative potential solitary waves (NPSWs) on the negative potential side. Consequently, we have seen that inside a certain domain \(\sigma _{sc}>\sigma ^{c}_{sc}\) , the amplitude of PPSW grows as \(\sigma _{sc}\) increases, and then the amplitude of PPSW decreases with increasing \(\sigma _{sc}\) . We found that the amplitude of PPSW reduces as \(n_{pc}\) , \(n_{sc}\) , \(\beta _{p}\) , \(\beta _{e}\) , and \(l_{z}\) grow, but it increases with rising \(\sigma _{pc}\) . The effect of parameters on the amplitude of PPSSs and NPSWs has also been considered. We also used phase portrait analysis to examine the characteristics of the various nonlinear wave structures.