Effect of collisions and magnetic convergence on electron acceleration and transport in reconnecting twisted solar flare loops

Abstract

We study a model of particle acceleration coupled with an MHD model of magnetic reconnection in unstable twisted coronal loops. The kink instability leads to the formation of helical currents with strong parallel electric fields resulting in electron acceleration. The motion of electrons in the electric and magnetic fields of the reconnecting loop is investigated using a test-particle approach taking into account collisional scattering. We discuss the effects of Coulomb collisions and magnetic convergence near loop footpoints on the spatial distribution and energy spectra of high-energy electron populations and possible implications on the hard X-ray emission in solar flares.

References in corpus (6)

• Local re-acceleration and a modified thick target model of solar flare electrons
• Particle Acceleration in an Evolving Network of Unstable Current Sheets
• Acceleration, magnetic fluctuations and cross-field transport of energetic electrons in a solar flare loop
• 3D MHD Flux Emergence Experiments: Idealized models and coronal interactions
• The sub-arcsecond hard X-ray structure of loop footpoints in a solar flare
• Hard X-ray footpoint sizes and positions as diagnostics of flare accelerated energetic electrons in the low solar atmosphere

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• Preparing for Solar and Heliospheric Science with the SKAO: An Indian Perspective
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• Probing Twisted Magnetic Field Using Microwave Observations in an M Class Solar Flare on 11 February, 2014
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