| |
 |
UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:14 |
 |
|
|
|
Conference: Bucharest University Faculty of Physics 2003 Meeting
Section: Nuclear and Elementary Particles Physics
Title:
Study of the Lateral and Temporal Structure
of the Shower Front at
KASCADE - Grande Distances
Authors:
G.Toma1, A.F.Badea1,2, A.Haungs2, H.Rebel2, T.Thouw2
Affiliation:
1 National Institute for Physics and Nuclear Engineering - Horia Hulubei
2 Forschungszentrum Karlsruhe, Institut fur Kernphysik
E-mail
Keywords:
Abstract:
The purpose of this study was to obtain information about the temporal and spatial structure of the shower front. For such a purpose, temporal observables (global arrival times of particles) and lateral particle densities in the shower front have been analyzed. The analysis concentrated only on simulated events. The analysis concentrated exclusively on the data contained in 150 simulated showers, 50 showers for each kind of the following primary particles: p, C and Fe. The showers were simulated for the same energy of the primary particle (10^16 eV) and for the same angle of incidence theta=0 (vertical showers). Also the study has been performed for different components of the shower front: muonic, electronic, electromagnetic and hadronic.
The results show that the arrival time distributions are different for the same EAS component at different threshold energies. As the scattering cross section decreases with energy, higher energy particles will be less scattered so will take a shorter time to reach detector level, thus inducing an overall decrease of arrival time. Also the cuartile times that have been calculated proved to be primary mass sensitive.
The second stage of the study focused on the analysis of the lateral structure of the shower front. The lateral density of the added muon - electron components was fitted with a modified NKG formula containing two parameters (a and h) of which one also proved to be primary mass sensitive.
A future step of the study will be to consider the interaction between shower front and detectors in order to obtain a much realistic estimate of the KASCADE Grande array response.
|
|
|
|