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Long-term dynamics driven by resonant wave–particle interactions: from Hamiltonian resonance theory to phase space mapping
Journal article   Open access   Peer reviewed

Long-term dynamics driven by resonant wave–particle interactions: from Hamiltonian resonance theory to phase space mapping

Anton V. Artemyev, Anatoly I. Neishtadt, Alexei. A. Vasiliev, Xiao-Jia Zhang, Didier Mourenas and Dmitri Vainchtein
Journal of plasma physics, v 87(2)
31 Mar 2021
DOI: https://doi.org/10.1017/S0022377821000246
url
https://doi.org/10.1017/s0022377821000246View
Published, Version of Record (VoR)CC BY-NC-ND V4.0,  Open

Abstract

Hamiltonian Methods in Plasma Physics
In this study we consider the Hamiltonian approach for the construction of a map for a system with nonlinear resonant interaction, including phase trapping and phase bunching effects. We derive basic equations for a single resonant trajectory analysis and then generalize them into a map in the energy/pitch-angle space. The main advances of this approach are the possibility of considering effects of many resonances and to simulate the evolution of the resonant particle ensemble on long time ranges. For illustrative purposes we consider the system with resonant relativistic electrons and field-aligned whistler-mode waves. The simulation results show that the electron phase space density within the resonant region is flattened with reduction of gradients. This evolution is much faster than the predictions of quasi-linear theory. We discuss further applications of the proposed approach and possible ways for its generalization.

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Collaboration types
Domestic collaboration
International collaboration
Web of Science research areas
Physics, Fluids & Plasmas
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