[en] Two important observables that describe extensive air showers (EAS) are the center of particle distribution in the shower front (the center of gravity of the particle distribution) and the arrival direction (the zenithal and azimuthal angle of the shower axis). A program was developed that, using results given by CORSIKA simulations, reconstructs the center of the EAS front and the arrival direction as well. The program uses different algorithms and a study of reconstructing efficiency has been done for each algorithm or even for the same algorithm relative to where an extensive air shower hits the detector array. As geometrical model for the detector array, the KASCADE - Grande detector array (Karlsruhe, Germany) has been used. The reconstruction of the center of the shower front has been done by using an algorithm that calculates the center of gravity of particle mass distribution in detectors. A good reconstruction efficiency has been achieved for showers hitting near the center of the array. Also, an increase in the reconstruction error as the shower front hits the array closer to the border occurred. The arrival direction reconstruction algorithms were used as input data while the arrival time of particles in detectors was deduced by approximating the shower front with a plane, a conic or a spherical surface. Efficiency of these algorithms has also been studied. (authors)
Source
Oancea, Margareta; Schiaua, Claudiu; Grecu, Dan; Dumitriu, Marinela (Horia Hulubei National Institute for Physics and Nuclear Engineering, PO Box MG-6, RO-76900 Bucharest-Magurele (Romania)) (eds.); Horia Hulubei National Institute for Physics and Nuclear Engineering, PO Box MG-6, RO-76900 Bucharest-Magurele (Romania); 163 p; ISSN 1454-2714; 
; 2003; p. 66; Available from author(s) or Office of Documentation, Publication and Printing, Horia Hulubei National Institute for Physics and Nuclear Engineering, PO Box MG-6, RO-76900 Bucharest-Magurele (RO). Also available at e-mail: anuar@ifin.nipne.ro; Available from Office of Documentation, Publication and Printing, Horia Hulubei National Institute for Physics and Nuclear Engineering, PO Box MG-6, RO-76900 Bucharest-Magurele (RO). Also available at http://ns.nipne.ro/Secretary/anuar01_02.pdf; Short communication. 3 refs., 1 fig.
; 2003; p. 66; Available from author(s) or Office of Documentation, Publication and Printing, Horia Hulubei National Institute for Physics and Nuclear Engineering, PO Box MG-6, RO-76900 Bucharest-Magurele (RO). Also available at e-mail: anuar@ifin.nipne.ro; Available from Office of Documentation, Publication and Printing, Horia Hulubei National Institute for Physics and Nuclear Engineering, PO Box MG-6, RO-76900 Bucharest-Magurele (RO). Also available at http://ns.nipne.ro/Secretary/anuar01_02.pdf; Short communication. 3 refs., 1 fig.