An investigation of using hump in the Cherenkov photon lateral distribution for Gamma-Hadron separation

Authors

Department of Physics, Semnan University , University Sq, Pardis No 1, P.O. Box 35195- 363, Semnan, Iran

Abstract

Simulation of gamma and hadron showers in the energy range 100GeV- 25TeV has been carried out. For a big ideal Cherenkov light array, characteristics of lateral distribution of Cherenkov photon density have been studied. Results from this ideal detector are compared with those simulated for a real TUNKA- like array to investigate experimental potential of using existence of a hump in lateral distribution of Cherenkov photon density for gamma-hadron separation. It is shown that by using this technique the proton rejection efficiency of %63 can be achieved in typical TUNKA-like arrays.

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[1] Arqueros F. et al., 2002 , Astropart.Phys., 17 , 3, 293-318
[2] Andringa S. et al., 2007, Proc. 30th ICRC , Mexico, 3 1321
[3] Ohm S. et al., 2009, Astropart.Phys., 31, 5, 383-391
[4] CTA consortium.eprint, 2010, arXiv1008.3703c
[5] Hillas A., 1996, Space Science Review, 75, 17
[6] Razdan A. et al., 2002, Astropart.Phys., 17, 4, 497-508
[7] Tokuno H. et al., 2003, Proc. 28th ICRC, Japan, 17, 497
[8] Heck D. et al., 1998, Forschungszentrum Karlsruhe Report FZKA, 6019
[9] Heck D. and Engel R., 2003, Proc. 28th ICRC, Japan, 7, 279
[10] Kalmykov N. N. et al., 1997, Nucl. Phys. B (Proc. Suppl.), 52B, 17
[11] Nishijima K. et al., 2005, Proc. 29th ICRC, Pune, 5, 327
[12] Budnev N. M. et al., 2005, Proc. 29th ICRC, Pune, 8, 255
[13] Majumdar P. et al., 2003, Astroparticle Physics, 18, 333
[14] http://sina.sharif.edu/ -observatory
[15] Barrau A. et al., 1998, NIMPA., 416, 2-3, 278-292
[16] Saavedra O. and Jones L. W., 2001, NCimC., 024, 497
[17] http://www.ngdc.noaa.gov/seg/geomag/magfield.shtml
[18] Rao M.V.S. and Sinha S., 1988, J. Phys. G: Nucl. Phys., 14, 811
[19] Patterson J.R. and Hillas A.M., 1983, J.Phys. G:Nucl Phys., 9, 1433
[20] Portocarrero C. E. and Arqueros F., 1998, J.Phys. G:Nucl Part. Phys, 24, 235