Trapping of plasmons in ion holes

P. K. Shukla, B. Eliasson

Research output: Contribution to journalArticle

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Abstract

We present analytical and numerical studies of a new electron plasma wave interaction mechanism, which reveals trapping of Langmuir waves in ion holes associated with nonisothermal ion distribution functions. This Langmuir ion hole interaction is a unique kinetic phenomenon governed by two second nonlinear differential equations in which the Langmuir wave electric field and ion hole potential are coupled in a complex fashion. Numerical analyses of our nonlinearly coupled differential equations exhibit trapping of localized Langmuir wave envelops in the ion hole, which is either standing or moving with sub-or super ion thermal speed. The resulting ambipolar potential of the ion hole is essentially negative, giving rise to bipolar slow electric fields. The present investigation thus offers a new Langmuir wave contraction scenario that has not been rigorously explored in plasma physics.
Original languageEnglish
Pages (from-to)647-652
Number of pages6
JournalJETP Letters
Volume77
Issue number12
DOIs
Publication statusPublished - 1 Jun 2003

Keywords

  • plasma
  • ion holes
  • Langmuir wave electric field
  • ion hole potential

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