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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 35, issue 1
Ann. Geophys., 35, 133–138, 2017
https://doi.org/10.5194/angeo-35-133-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 35, 133–138, 2017
https://doi.org/10.5194/angeo-35-133-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

ANGEO Communicates 24 Jan 2017

ANGEO Communicates | 24 Jan 2017

Pancake-like and tablet-like distribution functions of energetic electrons in the middle magnetosphere

Peter Bespalov1 and Olga Savina2 Peter Bespalov and Olga Savina
  • 1Institute of Applied Physics RAS, Nizhniy Novgorod, Russia
  • 2National Research University Higher School of Economics, Nizhniy Novgorod, Russia

Abstract. We propose a simple explanation of the prolonged existence of pancake-like electron velocity distributions in the radiation belts. The pancake-like distribution function is characterized by a longitudinal particle velocity (along the magnetic field) of the order of the thermal velocity of the background plasma. The parameters of the tablet-like distribution function with a characteristic longitudinal particle velocity of the order of 20 Alfvèn velocities are refined. Such distribution functions can occur in the middle magnetosphere near the magnetic equator with appropriate sources of energetic particles. The stability of these distributions is examined. The results agree with known experimental data.

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We propose a simple explanation of the prolonged existence of pancake-like electron velocity distributions in the radiation belts. The pancake-like distribution function is characterized by a longitudinal particle velocity (along the magnetic field) of the order of the thermal velocity of the background plasma. The parameters of the tablet-like distribution function are refined. The stability of these distributions is examined.
We propose a simple explanation of the prolonged existence of pancake-like electron velocity...
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