The Balkan, Black Sea and Caspian Sea Regional Network on Space Weather Studies

Details The Balkan, Black Sea and Caspian Sea Regional Network on Space Weather Studies The Balkan, Black Sea and Caspian Sea Regional Network on Space Weather Studies

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sunge...3...63s&link_type=abstract

Sun and Geosphere, vol.3, no.2, p. 63-66

Computer Science

Scientific paper

Charged particle acceleration by DC electric field in solar flare loop is considered. It is shown that acceleration is quite effective even for electric field value much less than Dreicer field. Two problems of particle acceleration are discussed: (i) Huge quantity of accelerated particles which needs preliminary particle injection into acceleration regime; (ii) Colgate paradox: huge current value (> 10^15 A) and magnetic field (> 10^6 G) are produced due to high acceleration rate H 10^37 el/s. The ways out are discussed. Peculiarities of propagation and emission of accelerated particle in coronal magnetic loop are analyzed. It is shown that due to wave-particle interaction the relativistic electron propagated along loop axis with the velocity 30 times less compared to light velocity. The reason for low polarization degree of H± emission generated by ~1 MeV protons is the scattering of protons on small-scale Alfven wave turbulence.

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