We present a method for studying the evolution of plasma turbulence by tracking dispersion relations in the energy spectrum in the wavenumber-frequency domain. We apply hybrid plasma simulations in a simplified two-dimensional geometry to demonstrate our method and its applicability to plasma turbulence in the ion kinetic regime. We identify four dispersion relations: ion-Bernstein waves, oblique whistler waves, oblique Alfvén/ion-cyclotron waves, and a zero-frequency mode. The energy partition and frequency broadening are evaluated for these modes. The method allows us to determine the evolution of decaying plasma turbulence in our restricted geometry and shows that it cascades along the dispersion relations during the early phase with an increasing broadening around the dispersion relations.
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September 2013
Letter|
September 10 2013
Spectral evolution of two-dimensional kinetic plasma turbulence in the wavenumber-frequency domain
H. Comişel;
H. Comişel
a)
1
Institut für Theoretische Physik, Technische Universität Braunschweig
, Mendelssohnstr. 3, D-38016 Braunschweig, Germany
2
Institute for Space Sciences
, Atomiştilor 409, P.O. Box MG-23, Bucharest-Măgurele RO-077125, Romania
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D. Verscharen;
D. Verscharen
3
Space Science Center, University of New Hampshire
, 8 College Rd., Durham, New Hampshire 03824, USA
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Y. Narita;
Y. Narita
4
Space Research Institute
, Austrian Academy of Sciences, Schmiedlstr. 6, A-8042 Graz, Austria
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U. Motschmann
U. Motschmann
1
Institut für Theoretische Physik, Technische Universität Braunschweig
, Mendelssohnstr. 3, D-38016 Braunschweig, Germany
5
Deutsches Zentrum für Luft- und Raumfahrt, Institut für Planetenforschung
, Rutherfordstr. 2, D-12489 Berlin, Germany
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a)
Electronic mail: h.comisel@tu-bs.de
Phys. Plasmas 20, 090701 (2013)
Article history
Received:
July 17 2013
Accepted:
August 14 2013
Citation
H. Comişel, D. Verscharen, Y. Narita, U. Motschmann; Spectral evolution of two-dimensional kinetic plasma turbulence in the wavenumber-frequency domain. Phys. Plasmas 1 September 2013; 20 (9): 090701. https://doi.org/10.1063/1.4820936
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