Test-particle acceleration in a hierarchical three-dimensional turbulence model

The acceleration of charged particles is relevant to the solar corona over a broad range of scales and energies. High-energy particles are usually detected in concomitance with large energy release events like solar eruptions and flares. Nevertheless, acceleration can occur at smaller scales, charac...

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Autor principal: Dmitruk, Pablo Ariel
Publicado: 2014
Materias:
acceleration of particles
magnetic reconnection
Sun: corona
turbulence
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v783_n2_p_Dalena
http://hdl.handle.net/20.500.12110/paper_0004637X_v783_n2_p_Dalena
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_0004637X_v783_n2_p_Dalena
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spelling paper:paper_0004637X_v783_n2_p_Dalena2023-06-08T14:29:11Z Test-particle acceleration in a hierarchical three-dimensional turbulence model Dmitruk, Pablo Ariel acceleration of particles magnetic reconnection Sun: corona turbulence The acceleration of charged particles is relevant to the solar corona over a broad range of scales and energies. High-energy particles are usually detected in concomitance with large energy release events like solar eruptions and flares. Nevertheless, acceleration can occur at smaller scales, characterized by dynamical activity near current sheets. To gain insight into the complex scenario of coronal charged particle acceleration, we investigate the properties of acceleration with a test-particle approach using three-dimensional magnetohydrodynamic (MHD) models. These are obtained from direct solutions of the reduced MHD equations, well suited for a plasma embedded in a strong axial magnetic field, relevant to the inner heliosphere. A multi-box, multiscale technique is used to solve the equations of motion for protons. This method allows us to resolve an extended range of scales present in the system, namely, from the ion inertial scale of the order of a meter up to macroscopic scales of the order of 10 km (1/100th of the outer scale of the system). This new technique is useful to identify the mechanisms that, acting at different scales, are responsible for acceleration to high energies of a small fraction of the particles in the coronal plasma. We report results that describe acceleration at different stages over a broad range of time, length, and energy scales. © 2014. The American Astronomical Society. All rights reserved. Fil:Dmitruk, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v783_n2_p_Dalena http://hdl.handle.net/20.500.12110/paper_0004637X_v783_n2_p_Dalena
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic acceleration of particles
magnetic reconnection
Sun: corona
turbulence
spellingShingle acceleration of particles
magnetic reconnection
Sun: corona
turbulence
Dmitruk, Pablo Ariel
Test-particle acceleration in a hierarchical three-dimensional turbulence model
topic_facet acceleration of particles
magnetic reconnection
Sun: corona
turbulence
description The acceleration of charged particles is relevant to the solar corona over a broad range of scales and energies. High-energy particles are usually detected in concomitance with large energy release events like solar eruptions and flares. Nevertheless, acceleration can occur at smaller scales, characterized by dynamical activity near current sheets. To gain insight into the complex scenario of coronal charged particle acceleration, we investigate the properties of acceleration with a test-particle approach using three-dimensional magnetohydrodynamic (MHD) models. These are obtained from direct solutions of the reduced MHD equations, well suited for a plasma embedded in a strong axial magnetic field, relevant to the inner heliosphere. A multi-box, multiscale technique is used to solve the equations of motion for protons. This method allows us to resolve an extended range of scales present in the system, namely, from the ion inertial scale of the order of a meter up to macroscopic scales of the order of 10 km (1/100th of the outer scale of the system). This new technique is useful to identify the mechanisms that, acting at different scales, are responsible for acceleration to high energies of a small fraction of the particles in the coronal plasma. We report results that describe acceleration at different stages over a broad range of time, length, and energy scales. © 2014. The American Astronomical Society. All rights reserved.
author Dmitruk, Pablo Ariel
author_facet Dmitruk, Pablo Ariel
author_sort Dmitruk, Pablo Ariel
title Test-particle acceleration in a hierarchical three-dimensional turbulence model
title_short Test-particle acceleration in a hierarchical three-dimensional turbulence model
title_full Test-particle acceleration in a hierarchical three-dimensional turbulence model
title_fullStr Test-particle acceleration in a hierarchical three-dimensional turbulence model
title_full_unstemmed Test-particle acceleration in a hierarchical three-dimensional turbulence model
title_sort test-particle acceleration in a hierarchical three-dimensional turbulence model
publishDate 2014
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v783_n2_p_Dalena
http://hdl.handle.net/20.500.12110/paper_0004637X_v783_n2_p_Dalena
work_keys_str_mv AT dmitrukpabloariel testparticleaccelerationinahierarchicalthreedimensionalturbulencemodel
_version_ 1768544619627282432

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