Stability of a diamagnetic cluster in the magnetosphere

Physics

Scientific paper

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Diamagnetism, Energetic Particles, Geomagnetism, Magnetically Trapped Particles, Magnetospheric Instability, Magnetohydrodynamic Stability, Magnetospheric Ion Density, Particle Acceleration

Scientific paper

The test-particle method is used to investigate the stability of a diamagnetic cluster (DC) of hot particles in the magnetosphere, and the possibility of DC generation in regions connected with active processes during substorms is assessed. The boundaries of regions of particle capture by the cluster oscillating along magnetic field lines are calculated, and the capture region is found to expand with an increase in the magnetic disturbance produced by the cluster. In addition, it is shown that, in order to generate a stable DC in the magnetosphere, it is necessary to have an injection of sufficiently intense fluxes of accelerated particles causing a significant disturbance in the magnetic field. The energy density of accelerated ion fluxes reaches a value of 3 x 10 to the -8th erg/cu cm, which produces a 1-nT disturbance in the magnetic field inside the cluster.

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