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Detailed Reference Information |
Khazanov, G.V. and Liemohn, M.W. (2002). Transport of photoelectrons in the nightside magnetosphere. Journal of Geophysical Research 107: doi: 10.1029/2001JA000163. issn: 0148-0227. |
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Kinetic modeling results are analyzed to examine the transport of photoelectrons through the nightside inner magnetosphere. Two sources are considered, those on the dayside from direct solar illumination and those across the nightside from light scattered by the upper atmosphere and geocorona. A natural filter exists on the nightside for the dayside photoelectrons. Coulomb collisions erode the distribution at low energies and low L shells, and magnetospheric convection compresses the electrons as they drift toward dawn. It is shown that for low-activity levels a band of photoelectrons forms between L = 4 and 6 that extends throughout the nightside local times and into the morning sector. For the scattered light photoelectrons the trapped zone throughout the nightside is populated with electrons of E < 30 eV. At high L shells near dawn, convective compression on the nightside yields an accelerated population with electrons at energies up to twice the ionospheric energy maximum (that is, roughly 1200 eV for dayside photoelectrons and 60 eV for scattered light electrons). Modeled energy and pitch angle distributions are presented to show the features of these populations. |
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BACKGROUND DATA FILES |
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Abstract |
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Keywords
Magnetospheric Physics, Magnetosphere/ionosphere interactions, Space Plasma Physics, Charged particle motion and acceleration, Magnetospheric Physics, Numerical modeling, Magnetospheric Physics, Magnetosphere--inner |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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