Chorus wave-normal statistics in the Earth's radiation belts from ray tracing technique
Hugo Breuillard,Yu. A. Zaliznyak,Vladimir Krasnoselskikh,Oleksiy Agapitov,Oleksiy Agapitov,Anton Artemyev,Anton Artemyev,G. Rolland +7 more
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In this paper, the authors reconstruct the realistic distribution of chorus wave-normals in radiation belts for all magnetic latitudes using three-dimensional ray tracing technique, which employs K. Ronnmark's WHAMP to solve hot plasma dispersion relation along the wave packet trajectory.Abstract:
. Discrete ELF/VLF (Extremely Low Frequency/Very Low Frequency) chorus emissions are one of the most intense electromagnetic plasma waves observed in radiation belts and in the outer terrestrial magnetosphere. These waves play a crucial role in the dynamics of radiation belts, and are responsible for the loss and the acceleration of energetic electrons. The objective of our study is to reconstruct the realistic distribution of chorus wave-normals in radiation belts for all magnetic latitudes. To achieve this aim, the data from the electric and magnetic field measurements onboard Cluster satellite are used to determine the wave-vector distribution of the chorus signal around the equator region. Then the propagation of such a wave packet is modeled using three-dimensional ray tracing technique, which employs K. Ronnmark's WHAMP to solve hot plasma dispersion relation along the wave packet trajectory. The observed chorus wave distributions close to waves source are first fitted to form the initial conditions which then propagate numerically through the inner magnetosphere in the frame of the WKB approximation. Ray tracing technique allows one to reconstruct wave packet properties (electric and magnetic fields, width of the wave packet in k-space, etc.) along the propagation path. The calculations show the spatial spreading of the signal energy due to propagation in the inhomogeneous and anisotropic magnetized plasma. Comparison of wave-normal distribution obtained from ray tracing technique with Cluster observations up to 40° latitude demonstrates the reliability of our approach and applied numerical schemes.read more
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Quantitative aspects of magnetospheric physics
Larry R. Lyons,D. J. Williams +1 more
TL;DR: In this paper, Charged-Particle Motion in Magnetic and Electric Fields is discussed. And the authors discuss the effect of trapped particles on the region and current due to Trapped Particles.
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Statistics of whistler mode waves in the outer radiation belt: Cluster STAFF-SA measurements
Oleksiy Agapitov,Oleksiy Agapitov,Anton Artemyev,Anton Artemyev,Vladimir Krasnoselskikh,Yuri V. Khotyaintsev,Didier Mourenas,Hugo Breuillard,Michael A. Balikhin,G. Rolland +9 more
TL;DR: In this article, the authors performed a statistical study of ELF/VLF emissions using wave measurements in the whistler frequency range for 10 years (2001-2010) aboard Cluster spacecraft.
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Oblique Whistler-Mode Waves in the Earth’s Inner Magnetosphere: Energy Distribution, Origins, and Role in Radiation Belt Dynamics
Anton Artemyev,Anton Artemyev,Oleksiy Agapitov,Didier Mourenas,Vladimir Krasnoselskikh,Vitalii Shastun,F. S. Mozer +6 more
TL;DR: In this paper, the statistics of occurrences and intensity of oblique chorus waves in the region of the outer radiation belt, comprised between the plasmapause and geostationary orbit, and discuss how their actual distribution may be explained by a combination of linear and non-linear generation, propagation, and damping processes.
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Characteristics of the Poynting flux and wave normal vectors of whistler‐mode waves observed on THEMIS
Wen Li,Jacob Bortnik,Richard M. Thorne,Christopher Cully,Lunjin Chen,Vassilis Angelopoulos,Yukitoshi Nishimura,J. B. Tao,John W. Bonnell,O. LeContel +9 more
TL;DR: In this article, the Poynting flux and wave normal vectors of whistler-mode waves outside the plasmapause are investigated for the lower (0.1-0.5 fce) and upper bands (0.,5-0,8 fce), where fce is the equatorial electron cyclotron frequency.
References
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Numerical Recipes in C: The Art of Scientific Computing
TL;DR: Numerical Recipes: The Art of Scientific Computing as discussed by the authors is a complete text and reference book on scientific computing with over 100 new routines (now well over 300 in all), plus upgraded versions of many of the original routines, with many new topics presented at the same accessible level.
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Limit on stably trapped particle fluxes
Charles F. Kennel,H. E. Petschek +1 more
TL;DR: The limit on stably trapped particle fluxes determined theoretically and compared with data from Explorer satellites was first established in this paper, and the limit was later confirmed by the International Journal of Astronautics.