Volume 106, Number 5, June 2014
|Number of page(s)
|Geophysics, Astronomy and Astrophysics
|30 May 2014
On the origin of the particle fluxes from the thunderclouds: Energy spectra analysis
Yerevan Physics Institute - Alikhanyan Brothers 2, Yerevan, Armenia
Received: 4 March 2014
Accepted: 29 April 2014
Simultaneous measurements of the gamma ray differential energy spectra, electric field disturbances, and meteorological conditions provided by experimental facilities located at Mt. Aragats in Armenia allows to establish the model of particle acceleration and propagation in thunderstorm atmosphere. We present comparisons of measured and modeled thunderstorm ground enhancements (TGEs). The origin of the majority of TGEs is the MOS process —the modification of energy spectra of cosmic ray electrons in the atmospheric electric fields. The gamma ray differential energy spectra are well described by the power law function with indexes in the range for the electric field strengths 0.8−1.5 kV/cm at altitudes of 3400−5000 m a.s.l. The good agreement of the characteristics of experimental and simulated TGEs gives hope to estimate the intracloud electric field by the observed parameters of TGE gamma ray energy spectra.
PACS: 92.60.Pw – Atmospheric electricity, lightning / 13.40.-f – Electromagnetic processes and properties / 94.05.Dd – Radiation processes
© EPLA, 2014
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