Discovery of the thunderstorm correlated fluxes of electrons, gammas and neutrons observed at mountain altitudes

Ashot Chilingarian (Yerevan)
DESY auditorium, 17:00h

The Aragats Space Environment Center facilities are routinely measuring fluxes of neutral and charged secondary cosmic rays incident the earth's surface. In 2009 we detect simultaneously very large fluxes of electrons, gamma-quanta and neutrons correlated with thunderstorm activity. During the period of the count rate enhancements lasting tens of minutes, millions of additional particles were detected. The energy spectra of electrons and gamma-quanta are rapidly falling and vanish at ~ 40 MeV. Here we show that our measurements support the particle acceleration mechanism operated in the low atmosphere during the thunderstorms.