The structure of azimuthally-small-scaled ULF-oscillations of hot space plasma in the curved magnetic field. The modes with the discrete spectrum

Heading: 
Space Physics
1Cheremnykh, OK, 2Klimushkin, DY, 2Mager, PN
1Space Research Institute under NAS and National Space Agency of Ukraine, Kyiv, Ukraine
2Institute of Solar-Terrestrial Physics of the Siberian Branch of the RAS, Irkutsk, Russia
Kinemat. fiz. nebesnyh tel (Online) 2016, 32(3):26-39
Start Page: Space Physics
Language: Russian
Abstract: 

The model of one-dimensional inhomogeneous cylindrical plasma with a magnetic field whose field-lines are concentric circles, and the equilibrium parameters of the magnetic field and the medium are changing across the magnetic shells was reviewed. Under this model, the possibility of the existence of Alfven modes with a discrete spectrum was shown. A prerequisite for the appearance of such modes is the presence of resonators across the magnetic shells, which can be implemented in the area of the ring current, or near the edge of plasmapause. The characteristics of the implementation modes with a discrete spectrum were studied. The results are compared with data of satellite observations. It was concluded that a significant part of the poloidal-polarized fluctuations in the Earth’s magnetosphere are oscillations with a discrete spectrum. It is shown that the proposed model, outside of which there were many unregistered properties of the magnetosphere, explains the main features of the experimentally observed generation of azimuthal small-scale fluctuations in the ULF-Earth plasma. The results can be used to interpret the measurement data from satellites and radars SuperDARN.
Keywords: Alfven modes, discrete spectrum, hot space plasma, magnetic field

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