Mass Composition Sensitivity of an Array of Water Cherenkov and Scintillation Detectors

Details Mass Composition Sensitivity of an Array of Water Cherenkov and Scintillation Detectors Mass Composition Sensitivity of an Array of Water Cherenkov and Scintillation Detectors

2011-09-08

arxiv.org/abs/1109.1692v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

4 pages, 7 figures. Presented at the 32nd ICRC, Beijing, China, 2011

Scientific paper

We consider a hybrid array composed of scintillation and water Cherenkov detectors designed to measure the cosmic ray primary mass composition at energies of about 1 EeV. We have developed a simulation and reconstruction chain to study the theoretical performance of such an array. In this work we investigate the sensitivity of mass composition observables in relation to the geometry of the array. The detectors are arranged in a triangular grid with fixed 750 m spacing and the configuration of the scintillator detectors is optimized for mass composition sensitivity. We show that the performance for composition determination can be compared favorably to that of Xmax measurements after the difference in duty cycles is considered.

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