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F. Combes, D. Barret, T. Contini, F. Meynadier and L. Pagani (eds) PARTICLE ACCELERATION IN A COMPLEX SOLAR ACTIVE
 

Summary: SF2A 2004
F. Combes, D. Barret, T. Contini, F. Meynadier and L. Pagani (eds)
PARTICLE ACCELERATION IN A COMPLEX SOLAR ACTIVE
REGION MODELLED BY A CELLULAR AUTOMATA MODEL
Dauphin, C.1, Vilmer, N.2 and Anastasiadis, A.3
1 Introduction
Cellular Automata (CA) models based on the concept of self organized criticality
(SOC) can mimic the complex evolution of the magnetic energy released in a solar
flare. Each burst of magnetic energy released is assumed to be the consequence
of a magnetic reconnection process. We aim to calculate electron and ion energy
distributions following the approach of Anastasiadis et al, 2004. We thus inves-
tigate the energy gain of these particles by direct electric fields in reconnecting
current sheets (RCS) simulated in the CA model by the evolution rules of the
magnetic field. However, the magnetic field configuration in the RCS implies dif-
ferent trajectories between different species of particles. The energy gained by
electrons and ions thus depends on theirs acceleration lengths le,p,i which are
mainly determined by the magnitude of the longitudinal magnetic field.
2 Model and results
2.1 Acceleration model
In order to relate the electric field seen by the particles in each RCS to the magnetic

  

Source: Anastasiadis, Anastasios - Institute for Space Applications and Remote Sensing, National Observatory of Athens

 

Collections: Physics