Freiburg 2008 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 84: Kosmische Strahlung IV

T 84.4: Vortrag

Donnerstag, 6. März 2008, 17:35–17:50, KGI-HS 1199

Investigations of the S(500) distribution for extensive air showers detected with the KASCADE-Grande array — •Gabriel Toma for the KASCADE-Grande collaboration — National Institute for Physics and Nuclear Engineering - Horia Hulubei, Bucharest ,Romania

Previous EAS investigations have shown that the particle density becomes independent of the primary mass at certain distances from the shower core and can be used as an estimator for the primary energy. In the context of the KASCADE-Grande experiment, the particular distance at which this effect takes place is around 500 m, hence the notation S(500). It has been shown that S(500) has a primary energy-like spectrum. We present results of further investigations in this direction. A correction function can be derived from the S(500) attenuation with the EAS angle of incidence thus allowing us to build an all event S(500) spectrum. Previously, the study relied on a three parameter Linsley parameterization for the lateral particle density distribution. Further tests have been performed now using a similar Linsley form in which one of the shape parameters has been considered fixed.