Gyroresonant Surfing Acceleration

Yasuhiro Kuramitsu,Vladimir Krasnoselskikh

doi:10.1103/physrevlett.94.031102

Abstract

We discuss a new acceleration or energization mechanism of charged particles in space and astrophysical plasmas. In the presence of an electrostatic potential gradient and a circularly polarized electromagnetic monochromatic wave, particles are accelerated efficiently by keeping cyclotron resonance with the wave due to the electrostatic dragging force. In addition, particles can propagate against the electrostatic potential even if they have smaller parallel energy. This mechanism is potentially widely applicable, in terms of particle acceleration and transport, to various space and astrophysical phenomena, such as shock environment and short-large amplitude magnetic structures. We introduce the basic physical process of the acceleration or energization mechanism theoretically and numerically.

Highlights

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not
The Diffusive shock acceleration (DSA) is associated mainly with quasiparallel shocks, while shock drift acceleration plays a main role of particle acceleration at the quasiperpendicular shocks [2]
Direct in situ measurements give clear evidence that the quasiparallel shock can be presented as a patchwork of short-large amplitude magnetic structures (SLAMS) rather than a continuous transition [4]

Summary

Introduction

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. In the presence of an electrostatic potential gradient and a circularly polarized electromagnetic monochromatic wave, particles are accelerated efficiently by keeping cyclotron resonance with the wave due to the electrostatic dragging force. This mechanism is potentially widely applicable, in terms of particle acceleration and transport, to various space and astrophysical phenomena, such as shock environment and short-large amplitude magnetic structures.

Results

Conclusion