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Research Article Open access CC BY 4.0

Investigation on High Velocity Plasmas and Field Aligned Currents at High Latitudes

J. C. K. Akhila, C. P. Anil Kumar

Asian Journal of Research and Reviews in Physics · pp. 22–29 · Published 10 Jul 2020

10.9734/ajr2p/2020/v3i230117

Abstract

The interaction of high velocity plasma with Earth’s magnetic field is fundamental and offer many questions on high latitude electrodynamics. The problems associated with influence of electric field and Field Aligned Current (FAC) generation is investigated with the aid of spherical cap harmonic analysis at 830 Mag. Lat. in southern hemispheres. The investigation is done on the cases with different Interplanetary Magnetic Field (IMF) conditions after the earth directed solar events. The helio-plasma parameters viz., density, velocity, energy, electron temperature are also noted during the field aligned current studies. It seems that, due to external magnetic field influence polarization of plasma electric field take place (reorientation of the convective cells). It happens with different orientation as per the magnitude and direction of By and Bz component and the horizontal currents. It is noted that the FAC value also depends on kinetic energy of the plasma streams and conductivity of external loading. As the plasma decelerates by force Jsw X Esw, the resultant current may extend along the field lines. Increases in the FAC density are seemed to be proportional to the transmission function.

Helio-plasma parameters high latitude electrodynamics plasma polarization field aligned currents.

References (7)

  1. 1 The amplitude distribution of field-aligned currents at northern high latitudes observed by Triad [DOI]
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  3. 3 The relationship between ionospheric and field‐aligned currents in the dayside cusp [DOI]
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