Journal
ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS
Volume 29, Issue 2, Pages 111-115Publisher
PLEIADES PUBLISHING INC
DOI: 10.1134/1.1544533
Keywords
solar flares; magnetic traps; trapping coefficient; anisotropy parameter; electric potential; particle confinement region
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We consider the behavior of charged particles with an anisotropic initial velocity distribution in a magnetic trap with approaching mirrors in connection with the problem of particle acceleration in solar flares. We show that, irrespective of the charge sign, the efficiency of confinement and acceleration increases with increasing anisotropy factor of the initial distribution alpha = (Tperpendicular to/Tparallel to)(1/2). For a positive electric potential of the trap plasma relative to the mirrors, the emerging additional effect of ion expulsion form the trap increases with alpha(i). The derived estimate of the electric potential suggests an amplification of the initial perturbation and the development of instability. (C) 2003 MAIK Nauka/Interperiodica.
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