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Interaction of Relativistic Electrons with Packets of the Electromagnetic Ion Cyclotron Waves of Finite Length and Low Amplitude

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Abstract

Interaction of relativistic electrons with packets of the electromagnetic ion cyclotron waves of finite length and low amplitude in the Earth’s radiation belts is analyzed. The variance of the equatorial pitch angle of electrons for wave packets located near the Earth’s geomagnetic equator is estimated analytically within the linear approximation. The analytical estimates agree with the results of numerical test-particle simulation. It is demonstrated that reduction in the packet length extends the interaction range to lower energies beyond the range of resonant energies. Such an interaction can result in precipitation of electrons with energies on the order of several hundred kiloelectronvolts into the ionosphere.

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Funding

Research carried out by V.S. Grach (derivation of analytical expressions, numerical simulations, comparison of the results of analytical and numerical calculations) was supported by the Russian Science Foundation, project no. 19-72-10111. Research carried out by A.G. Demekhov (formulation of the problem and analysis of the results of the calculations) was supported by the Russian Science Foundation, project no. 22-62-00048.

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Authors and Affiliations

  1. Gaponov-Grekhov Institute of Applied Physics, Russian Academy of Sciences, 603166, Nizhny Novgorod, Russia

    V. S. Grach & A. G. Demekhov

  2. Polar Geophysical Institute, 184209, Apatity, Russia

    A. G. Demekhov

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  1. V. S. Grach
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Correspondence to V. S. Grach.

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Grach, V.S., Demekhov, A.G. Interaction of Relativistic Electrons with Packets of the Electromagnetic Ion Cyclotron Waves of Finite Length and Low Amplitude. Plasma Phys. Rep. 49, 901–911 (2023). https://doi.org/10.1134/S1063780X23600561

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