Dispersion of the waves in magnitoactive plasma with sub-Dreicer electric field and strong density inhomogeneity in arch structures,

Details Dispersion of the waves in magnitoactive plasma with sub-Dreicer electric field and strong density inhomogeneity in arch structures, Dispersion of the waves in magnitoactive plasma with sub-Dreicer electric field and strong density inhomogeneity in arch structures,

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002kfnt...18..258k&link_type=abstract

Kinematika i Fizika Nebesnykh Tel, vol. 18, no. 3, p. 258-272

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Scientific paper

The dispersion relation for low-frequency plasma waves in the loop structures in solar active regions is supplemented by the terms which take into account the ion thermal motion and boundary values of angle between the directions of wave vector and loop magnetic field. The roots of modified dispertion relation, which turns out to be the polynomial of the fourth order, have been obtained on the base of Euler method. It proved to be possible to divide the close area of varying of plasma model parameters into two non-intersecting subareas, one of which corresponds to the case of "weak" inhomogeneity of density, and another, -- to the "strong" one. Physical properties of inhomogeneity in second case turn out to be close to the properties of high-turbulent current layer in preflare stage. Among the obtained four real roots of dispersion relation the first two roots correspond to the direct and inverse kinetic alfven waves modified by the presence of weak electric field and inhomogeneity of plasma density. The another two roots correspond to a new type of waves with abnormal dependence of phase velocity on ion gyroradius and ratio of electron temperature to ion one.

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