M. Ambrosio et al., INTERPRETATION OF THE TIME STRUCTURE OF THE EAS DISC MEASURED BY THE GREX COVER-PLASTEX EXPERIMENT/, Astroparticle physics, 7(4), 1997, pp. 329-341
Simulation results for the time structure of the extensive air shower
disc are presented and compared with data from the GREX/COVER_PLASTEX
experiment. The distribution of the arrival times at various distances
from the shower core and the contributions from the secondary particl
es to the shape of the distribution are described. The main parameters
of the distribution, the mean time of arrival [tau] and the standard
deviation sigma, reflect the shower disc profile and thickness. The de
pendence of the shower profile and thickness on the energy and mass of
the primary particle initiating the shower as well as on its inclinat
ion angle is discussed. The influence of the experimental conditions o
n the disc profile and thickness measured by the GREX/COVER_PLASTEX ex
periment is analysed and a parametrization of the average profile and
thickness is given. (C) 1997 Elsevier Science B.V.