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Record Details

Record 70 of 23177
Large- and Small-Scale Ring Current Electrodynamic Coupling
Author and Affiliation:
Khazanov, G. V.(National Space Science and Technology Center, Huntsville, AL, United States)
Abstract: In this talk we will address the two primary issues of ring current (RC) electrodynamic coupling: 1. RC self-consistent magnetosphere-ionosphere coupling that includes calculation of the magnetospheric electric field (large scale electrodynamic coupling); and 2. RC self-consistent coupling with electromagnetic ion cyclotron (EMIC) waves (small scale electrodynamic coupling). Our study will be based on two RC models that we have recently developed in our group. The first model by Khazanov et al. [2002] couples the system of two kinetic equations: one equation which describes the RC ion dynamics and another equation which describes the energy density evolution of EMIC waves. The second model by Khazanov et al. [2003] deals with large scale electrodynamic coupling processes and provides a self-consistent simulation of RC ions and the magnetospheric electric field. There is presently no model that addresses both of these issues simultaneously in a self-consistent calculation. However, the need exists for such a model, because these two processes directly influence each other, with the mesoscale coupling changing the drift paths of the thermal and energetic particle populations in the inner magnetosphere, thereby changing the wave interactions, and the microscale coupling altering the pitch angle distributions and ionospheric conductivities (through increased precipitation), thus changing the field-aligned currents and electric potential structure. The initial thrust of the work will be the development of a combined kinetic model of micro- and meso-scale RC electrodynamic coupling processes and to examine their interactions with each other on a global scale.
Publication Date: Jan 01, 2003
Document ID:
20040034113
(Acquired Mar 19, 2004)
Subject Category: ASTROPHYSICS
Document Type: Preprint
Meeting Information: 30th Anniversary Yosemite Workshop on Inner Magnetosphere Interaction; 3-6 Feb. 2004; Yosemite, CA; United States
Financial Sponsor: NASA Marshall Space Flight Center; Huntsville, AL, United States
Organization Source: National Space Science and Technology Center; Huntsville, AL, United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: MATHEMATICAL MODELS; MAGNETOSPHERE-IONOSPHERE COUPLING; ELECTROMAGNETIC RADIATION; RING CURRENTS
Availability Source: Other Sources
Availability Notes: Abstract Only
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