scholarly journals Particle acceleration and heating in a turbulent solar corona

2018 ◽  
Vol 61 (1) ◽  
pp. 014020 ◽  
Author(s):  
Loukas Vlahos ◽  
Heinz Isliker
Keyword(s):  
Particle Acceleration ◽  
Solar Corona

scholarly journals Fundamental physical processes in coronae: Waves, turbulence, reconnection, and particle acceleration

2007 ◽  
Vol 3 (S247) ◽  
pp. 257-268
Author(s):  
Markus J. Aschwanden
Keyword(s):  
Particle Acceleration ◽  
Solar Corona ◽  
Acoustic Waves ◽  
Plasma Heating ◽  
High Energy ◽  
X Rays ◽  
Line Broadening ◽  
Routine Basis ◽  
Related Line ◽  
High Energy Particles

AbstractOur understanding of fundamental processes in the solar corona has been greatly progressed based on the space observations of SMM, Yohkoh, Compton GRO, SOHO, TRACE, RHESSI, and STEREO. We observe now acoustic waves, MHD oscillations, turbulence-related line broadening, magnetic configurations related to reconnection processes, and radiation from high-energy particles on a routine basis. We review a number of key observations in EUV, soft X-rays, and hard X-rays that innovated our physical understanding of the solar corona, in terms of hydrodynamics, MHD, plasma heating, and particle acceleration processes.

scholarly journals PIC Simulations of Excited Waves in the Plasmoid Instability

2022 ◽  
Vol 8 ◽  
Author(s):  
Mahdi Shahraki Pour ◽  
Mahboub Hosseinpour
Keyword(s):  
Particle Acceleration ◽  
Kinetic Energy ◽  
Solar Corona ◽  
Current Sheet ◽  
Electromagnetic Waves ◽  
Magnetic Energy ◽  
Particle In Cell ◽  
Guide Field ◽  
Collisionless Regime ◽  
Accelerated Particles

Fragmentation of an elongated current sheet into many reconnection X-points, and therefore multiple plasmoids, occurs frequently in the solar corona. This speeds up the release of solar magnetic energy in the form of thermal and kinetic energy. Moreover, due to the presence of multiple reconnection X-points, the particle acceleration is more efficient in terms of the number of accelerated particles. This type of instability called “plasmoid instability” is accompanied with the excitation of some electrostatic/electromagnetic waves. We carried out 2D particle-in-cell simulations of this instability in the collisionless regime, with the presence of non-uniform magnetic guide field to investigate the nature of excited waves. It is shown that the nature and properties of waves excited inside and outside the current sheet are different. While the outside perturbations are transient, the inside ones are long-lived, and are directly affected by the plasmoid instability process.

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