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Relativistic runaway electron avalanche development near the electric field threshold in inhomogeneous air
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  • Gabriel Sousa Diniz,
  • Yuuki Wada,
  • Yutaka Ohira,
  • Kazuhiro Nakazawa,
  • Miwa Tsurumi,
  • Teruaki Enoto
Gabriel Sousa Diniz
Kyoto University

Corresponding Author:diniz.gabriel.58j@st.kyoto-u.ac.jp

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Yuuki Wada
Osaka University
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Yutaka Ohira
Department of Earth and Planetary Environmental Science, The University of Tokyo
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Kazuhiro Nakazawa
Nagoya University
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Miwa Tsurumi
Kyoto University
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Teruaki Enoto
Kyoto University
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Relativistic Runaway Electrons Avalanches (RREAs) development depends on the applied electric field and the environment air density. This dependency controls the RREA exponential growth length scale. The RREA development affects the bremsstrahlung excess occurring due to the passage of charged particles through the thundercloud’s electric fields, the gamma-ray glow. We used Monte Carlo simulations to develop an empirical model showing the RREA behavior in a realistic atmospheric density profile. The new formulation shows how the density variation modulates the electron population under electric field strengths near the RREA electric field threshold. The model limits the initial RREA altitude range as a function of the electric field strength. The new model is valid between $\sim$ 0.6 and $\sim$ 18 km, covering the relevant heights to investigate the generation of ground-detected gamma-ray glows.
23 Jun 2023Submitted to ESS Open Archive
23 Jun 2023Published in ESS Open Archive