Laitinen, T., Dalla, S. and Kelly, J. (2012) Energetic particle diffusion in structured turbulence. The Astrophysical Journal, 749 (2). pp. 103-111. ISSN 0004-637X
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Official URL: http://dx.doi.org/10.1088/0004-637X/749/2/103
In the full-orbit particle simulations of energetic particle transport in plasmas, the plasma turbulence is typically described as a homogeneous superposition of linear Fourier modes. The turbulence evolution is, however, typically a nonlinear process, and, particularly in the heliospheric context, the solar wind plasma is inhomogeneous due to the transient structures, as observed by remote and in situ measurements. In this work, we study the effects of the inhomogeneities on energetic particle transport by using spatially distributed, superposed turbulence envelopes. We find that the cross-field transport is significantly reduced, when compared to the results obtained with homogeneous turbulence. The reduction can reach an order of magnitude when the enveloping breaks the wave phase coherence along the mean magnetic field direction.
|Uncontrolled Keywords (separate with ;):||cosmic rays ; diffusion ; turbulence|
|Subjects:||Physical sciences > Physics|
|Schools:||Faculty of Science and Technology > School of Physical Sciences and Computing|
|Deposited By:||Malgosia Bagot|
|Deposited On:||27 Jun 2012 13:26|
|Last Modified:||09 Aug 2016 15:16|
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