• Stability analysis of a model equilibrium for a gravito-electrostatic sheath in a colloidal plasma under external gravity effect

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      https://www.ias.ac.in/article/fulltext/pram/052/03/0293-0302

    • Keywords

       

      Colloidal plasma; acoustic waves; levitational equilibrium; acoustic turbulence; Coulomb phase transition; wave turbulence model

    • Abstract

       

      The present contribution tries to find a scientific answer to the question of stability of an equilibrium plasma sheath in a colloidal plasma system under external gravity effect. A model equilibrium of hydrodynamical character has been discussed on the basis of quasi-hydrostatic approximation of levitational condition. It is found that such an equilibrium is highly unstable to a modified-ion acoustic wave with a conditional likelihood of linear driving of the so-called acoustic mode too. Thus, it is reported (within fluid treatment) that a plasma-sheath edge in a colloidal plasma under external gravity effect could be highly sensitive to the acoustic turbulence. Its consequential role on possible physical mechanism of Coulomb phase transition has been conjectured. However, more rigorous calculations as future course of work are required to corroborate our phenomenological suggestions.

    • Author Affiliations

       

      KAvita Rani Rajkhowa1 C B Dwivedi1 2 S Bujarbarua1

      1. Centre of Plasma Physics, Saptaswahid Path, Dispur, Guwahati - 781 006, India
      2. Institute of Advanced Study in Science and Technology, Khanapara, Guwahati - 781 022, India
    • Dates

       
  • Pramana – Journal of Physics | News

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