The KASCADE Air Shower Experiment: Composition Analyses and Energy Spectrum

Details The KASCADE Air Shower Experiment: Composition Analyses and Energy Spectrum The KASCADE Air Shower Experiment: Composition Analyses and Energy Spectrum

Aug 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999icrc....3..159k&link_type=abstract

Proceedings of the 26th International Cosmic Ray Conference. August 17-25, 1999. Salt Lake City, Utah, USA. Under the auspices o

Physics

Scientific paper

Since its start-up early 1996 KASCADE has collected more than 200 Mio. events with an energy threshold of approx. 1014 eV. A unique feature of KASCADE is the simultaneous measurement of electrons, muons, and hadrons at high quality. The large body of data can consistently be described only, if an increasingly heavier composition is assumed above the knee. Quantitatively, subtle differences are identified between hadronic and electromagnetic measurements, with the former pointing to an overall heavier composition. The knee in the primary energy spectrum is observed at Ek = 4-5 PeV with a change of the spectral index from ' 2:7 to 3.1. We critically discuss the preliminary results and point out possible future improvements, particularly in the modeling of EAS.

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