National Aeronautics and Space Administration

Living With A Star

Targeted Research and Technology

Ring Current Instabilities and Their Magnetospheric Consequences

ROSES ID: NNH10ZDA001N      Selection Year: 2011      

Program Element: Focused Science Topic

Principal Investigator: Stephen Peter Gary

Project Member(s):
Jordanova, Vania K Co-I Los Alamos National Laboratory
Zaharia, Sorin G Co-I Los Alamos National Laboratory
MacDonald, Elizabeth Co-I NASA Goddard Space Flight Center
Liu, Kaijun Postdoctoral Associate null


Our proposed research will use satellite data analysis, a comprehensive model of the inner magnetosphere, linear kinetic dispersion theory, hybrid and particle-in-cell (PIC) simulations, and test-particle computations to carry out an integrated study of how kinetic instabilities in the magnetospheric ring current arise, propagate, and scatter both ions and fast electrons. We intend to address two distinct kinetic modes: the Alfven-cyclotron instability which leads to EMIC waves, and the proton Bernstein mode instability which generates magnetosonic waves. We will use geosynchronous observations from Los alamos plasma instruments and the RAM-SCB self-consistent inner magnetospheric model to gain insight into the ion velocity distributions which drive such waves; using such distributions we will use hybrid and PIC codes to generate enhanced field fluctuations and determine how ions are scattered, and test-particle computations to calculate how such fields pitch-angle scatter and accelerate fast electrons. These computations will yield particle transport coefficients which will be fed back into the RAM-SCB code, thereby improving the representations of global transport by that code. This research would make fundamental scientific contributions to the LWS Focused Science Team "Incorporating Plasma Waves in Models of the Radiation Belts and Ring Current."


Performance YearReferenceInvestigation TypeActions
1Liu, Kaijun; Gary, S. Peter; Winske, Dan; (2011), Excitation...
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1Liu, Kaijun; Gary, S. Peter; Winske, Dan; (2011), Excitation...
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1Liu, Kaijun; Winske, Dan; Gary, S. Peter; Reeves, Geoffrey D...
not set
1Fu, Xiangrong; Cowee, Misa M.; Jordanova, Vania K.; Gary, S....
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Performance YearReferenceActions
1Gary, S. P.; Liu, K.; Winske, D.; (2011), Whistler ani...
1MacDonald, E.; Funsten, H. O.; Gary, S. P.; Kletzing, C.; Re...
1Reeves, G. D.; MacDonald, E.; Funsten, H. O.; Skoug, R. M.; ...
1Fu, X.; Cowee, M.; Friedel, R. H.; Gary, S. P.; Hospodarsky,...

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