Alfvénic Solitary and Shock Waves in Plasmas

  • Padma Kant Shukla
  • Bengt Eliasson
  • Lennart Stenflo
Conference paper
Part of the Astrophysics and Space Science Proceedings book series (ASSSP, volume 33)

Abstract

We present a review of nonlinear Alfvénic solitary and shock waves in a magnetized electron-ion plasma. The dynamics of these nonlinear dispersive Alfvén waves is governed by the two-fluid equations, coupled with Faraday’s and Ampère’s laws. First, we demonstrate the existence of large amplitude compressional Alfvénic solitary and shock waves propagating across the external magnetic field in a warm electron-ion magnetoplasma. It is found that these nonlinear structures can exist in well defined speed ranges above the Alfvén speed, and their widths are several times larger than the electron skin depths. Second, we study the formation of nonlinear slow magnetosonic solitary (SMS) waves propagating almost perpendicular to the external magnetic field direction. The propagation speed of the SMS waves is below the Alfvén speed and their width is a few ion skin depth in a collisionless magnetoplasma. The nonlinear dispersive Alfvén waves, as discussed here, can be associated with localized electromagnetic field excitations in magnetized laboratory and space plasmas that are composed of magnetized electrons and ions.

Keywords

Shock Wave Hall Current Solitary Pulse Wave Electric Field Lower Hybrid Resonance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

This research was supported by the Deutsche Forschungsgemeinschaft through the project SH21/3-2 of the Research Unit 1048.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Padma Kant Shukla
    • 1
    • 2
  • Bengt Eliasson
    • 3
  • Lennart Stenflo
    • 4
  1. 1.International Centre for Advanced Studies in Physical Sciences and Institute for Theoretical Physics, Faculty of Physics and AstronomyRuhr University BochumBochumGermany, EU
  2. 2.Department of Mechanical and Aerospace Engineering and Center for Energy ResearchUniversity of California San DiegoLa JollaUSA
  3. 3.International Centre for Advanced Studies in Physical Sciences and Institute for Theoretical Physics, Faculty of Physics and AstronomyRuhr University BochumBochumGermany
  4. 4.Department of PhysicsLinköping UniversityLinköpingSweden

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