Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apjs...73..321s&link_type=abstract
(NASA and University of New Hampshire, Workshop on Impulsive Solar Flares, 2nd, Durham, NH, Sept. 26-28, 1988) Astrophysical Jou
Astronomy and Astrophysics
Astrophysics
23
Coronal Loops, Particle Acceleration, Plasma Jets, Solar Flares, Magnetic Field Configurations, Magnetoelastic Waves, Relativistic Particles, Solar Electrons, Solar Magnetic Field, Solar Protons
Scientific paper
Numerical simulations based on the theory of Sakai and Tajima (1986) are used to study high-energy particle acceleration during current loop coalescence in solar flares. The results show that the electrons and protons can be quasi-periodically accelerated to relativistic energies in a very short period of time (much less than 1 sec) when the ratio of poloidal (loop current) to toroidal (potential field) components of the magnetic field is greater than one. It is shown that the spiral two-sided plasma jet can be explosively driven by the plasma rotational motion during the two-current loop coalescence process. Also, it is found that the rebound following the plasma collapse caused by the magnetic pinch effect may induce super-magnetosonic flow that can lead to fast magnetosonic shock waves.
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