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Relativistic runaway electron avalanches within complex thunderstorm electric field structures
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  • Egor Stadnichuk,
  • Ekaterina Svechnikova,
  • Alexander Nozik,
  • Daria Zemlianskaya,
  • Timur Khamitov,
  • Mikhail Zelenyi,
  • Maxim S. Dolgonosov
Egor Stadnichuk
Moscow Institute of Physics and Technology

Corresponding Author:[email protected]

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Ekaterina Svechnikova
Institute of Applied Physics of RAS
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Alexander Nozik
Moscow Institute of Physics and Technology
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Daria Zemlianskaya
Moscow Institute of Physics and Technology
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Timur Khamitov
Moscow Institute of Physics and Technology
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Mikhail Zelenyi
The Institute for Nuclear Research of the Russian Academy of Sciences
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Maxim S. Dolgonosov
Space Research Institute of RAS
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Relativistic runaway electron avalanches (RREAs) are generally accepted as a source of thunderstorms gamma-ray radiation. Avalanches can multiply in the electric field via the relativistic feedback mechanism based on processes with gamma-rays and positrons. This paper shows that a non-uniform electric field geometry can lead to the new RREAs multiplication mechanism - “reactor feedback’, due to the exchange of high-energy particles between different accelerating regions within a thundercloud.
A new method for the numerical simulation of RREA dynamics within heterogeneous electric field structures is proposed.
The developed analytical description and the numerical simulation enables us to derive necessary conditions for TGF occurrence
in the system with the reactor feedback
Observable properties of TGFs influenced by the proposed mechanism are discussed.
27 Dec 2021Published in Journal of Geophysical Research: Atmospheres volume 126 issue 24. 10.1029/2021JD035278