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Phys. Plasmas 19, 010701 (2012); http://dx.doi.org/10.1063/1.3676157 (4 pages)

Chorus wave amplification: A free electron laser in the Earth’s magnetosphere

A. R. Soto-Chavez1, A. Bhattacharjee1, and C. S. Ng2

1Space Science Center, University of New Hampshire, Durham, New Hampshire 03824, USA
2Geophysical Institute, University of Alaska Fairbanks, Fairbanks, Alaska 99775, USA

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(Received 6 October 2011; accepted 28 November 2011; published online 6 January 2012)

A new theoretical model for whistler-mode chorus amplification in the Earth’s magnetosphere is presented. We derive, based on the free-electron laser mechanism in a high-gain amplifier, a new closed set of self-consistent relativistic equations that couple the Hamiltonian equations for particles with Maxwell’s equations. We demonstrate that these equations predict, through a cubic equation, whistler amplification levels in good agreement with those observed in the Earth’s magnetosphere.

© 2012 American Institute of Physics

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KEYWORDS and PACS

PACS

  • 94.80.+g

    Instrumentation for space plasma physics, ionosphere, and magnetosphere

  • 41.60.Cr

    Free-electron lasers

  • 52.27.Ny

    Relativistic plasmas

  • 94.30.Tz

    Electromagnetic wave propagation

  • 94.30.Xy

    Radiation belts

ARTICLE DATA

PUBLICATION DATA

ISSN

1070-664X (print)  
1089-7674 (online)

For access to fully linked references, you need to log in.
    M. Lampe, G. Joyce, W. M. Manheimer, and G. Ganguli, Phys. Plasmas 17, 022902 (2010)PHPAEN000017000002022902000001.

    R. Bonifacio, F. Casagrande, and L. D. S. Souza, Phys. Rev. A 33, 2836 (1986).

    C. S. Ng and A. Bhattacharjee, Phys. Rev. E 58, 3826 (1998).

    J. L. Vomvoridis and J. Denavit, Phys. Fluids 22, 367 (1979)PFLDAS000022000002000367000001.


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