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- S. S. Cerri
- Max-Planck-Institut für Plasmaphysik 1 , Boltzmannstr. 2, D-85748 Garching, Germany
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- A. Bañón Navarro
- Max-Planck-Institut für Plasmaphysik 1 , Boltzmannstr. 2, D-85748 Garching, Germany
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- F. Jenko
- Max-Planck-Institut für Plasmaphysik 1 , Boltzmannstr. 2, D-85748 Garching, Germany
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- D. Told
- Max-Planck-Institut für Plasmaphysik 1 , Boltzmannstr. 2, D-85748 Garching, Germany
書誌事項
- 公開日
- 2014-08-01
- DOI
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- 10.1063/1.4892347
- 公開者
- AIP Publishing
この論文をさがす
説明
<jats:p>Nonlinear gyrokinetics provides a suitable framework to describe short-wavelength turbulence in magnetized laboratory and astrophysical plasmas. In the electrostatic limit, this system is known to exhibit a free energy cascade towards small scales in (perpendicular) real and/or velocity space. The dissipation of free energy is always due to collisions (no matter how weak the collisionality), but may be spread out across a wide range of scales. Here, we focus on freely decaying two dimensional electrostatic turbulence on sub-ion-gyroradius scales. An existing scaling theory for the turbulent cascade in the weakly collisional limit is generalized to the moderately collisional regime. In this context, non-universal power law scalings due to multiscale dissipation are predicted, and this prediction is confirmed by means of direct numerical simulations.</jats:p>
収録刊行物
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- Physics of Plasmas
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Physics of Plasmas 21 (8), 2014-08-01
AIP Publishing