Thumbnail
Access Restriction
Open

Author Cladis, J. B. ♦ Francis, W. E.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ MAGNETIC STORMS ♦ RING CURRENTS ♦ BOUNDARY LAYERS ♦ DIFFUSION ♦ DISTRIBUTION FUNCTIONS ♦ ELECTRIC FIELDS ♦ IONOSPHERIC EFFECTS ♦ MAGNETOSPHERE ♦ MONTE CARLO METHOD ♦ PLASMA SHEET ♦ CURRENTS ♦ EARTH ATMOSPHERE ♦ EARTH MAGNETOSPHERE ♦ ELECTRIC CURRENTS ♦ FUNCTIONS ♦ LAYERS ♦ Atmospheric Physics- Magnetospheric Phenomena- (-1987)
Abstract The transport of ions from the polar ionosphere to the inner magnetosphere during storm time conditions has been computed using a Monte Carlo diffusion code. The effect of the electrostatic turbulence assumed to be present during the substorm expansion phase was simulated by a process that accelerated the ions stochastically perpendicular to the magnetic field with a diffusion coefficient proportional to the rate of energization of the ions by the induced electric field. This diffusion process was continued as the ions were convected from the plasma sheet boundary layer to the double-spiral injection boundary. Inward of the injection boundary the ions were convected adiabatically. By using as input an O/sup +/ flux of 2.8 x 10/sup 8/ cm/sup -2/ s/sup -1/ (w>10 eV) and an H/sup +/ flux of 5.5 x 10/sup 8/ cm/sup -2/ s/sup -1/ (w>.63 eV) the computed distribution functions of the ions in the ring current were found to be in good agreement, over a wide range in L(4--8), with measurements made with the ISEE 1 satellite during a storm. This O/sup +/ flux and a large part of the H/sup +/ flux appear to be consistent with the DE-1 and DE-2 satellite measurements of the polar ionospheric outflow during disturbed times.
Educational Use Research
Learning Resource Type Article
Publisher Date 1985-04-01
Publisher Department Lockheed Palo Alto Research Laboratory, California
Publisher Place United States
Journal J. Geophys. Res.
Volume Number 90
Issue Number A4
Organization Lockheed Palo Alto Research Laboratory, California


Open content in new tab

   Open content in new tab