Laboratory tests of two-dimensional wavelet trigger in radio detection of cosmic rays
Zbigniew Szadkowski, Anna Szadkowska
DOI: http://dx.doi.org/10.15439/2017F124
Citation: Communication Papers of the 2017 Federated Conference on Computer Science and Information Systems, M. Ganzha, L. Maciaszek, M. Paprzycki (eds). ACSIS, Vol. 13, pages 115–123 (2017)
Abstract. The origin of ultrahigh-energy cosmic rays (UHECRs)(E $\ge$ 10$^{17}$ eV) is a fundamental question of astroparticle physics. The induced shower of secondary particles in the atmosphere of the Earth provides essential information on the cosmic ray itself: arrival direction, primary energy, and mass. In the air shower many electrons and positrons form a pancake-shaped particle front with a typical thickness less than 1 m close to the shower axis to more than 10 m far from the shower axis The geomagnetic field induces a drift velocity in these particles which is perpendicular to the direction of the initial cosmic ray. The generated current is a source of coherent emission of electromagnetic waves at wavelengths larger than the size of the dimension of the charge cloud i.e., for radio frequencies in the range of 30-300 MHz.