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Mass composition sensitivity of combined arrays of water cherenkov and scintillation detectors in the EeV range
Institution:1. Institut für Experimentelle Kernphysik (IEKP), Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany;2. Institut für Kernphysik (IK), Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany;1. Gran Sasso Science Institute, viale Francesco Crispi, 7 L’Aquila 67100 (AQ), Italy;2. Institute for Space Sciences (CSIC/IEEC), Barcelona E-08193, Spain;3. Dublin Institute of Advanced Studies, 10 Burlington Road, Dublin 4, Ireland;4. Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, Heidelberg D-69117, Germany;1. Institute for Nuclear Research, 60th October Anniversary pr. 7A, Moscow 117312, Russia;2. Joint Institute for Nuclear Research, Dubna 141980, Russia;3. Irkutsk State University, Irkutsk 664003, Russia;4. Skobeltsyn Institute of Nuclear Physics MSU, Moscow 119991, Russia;5. Nizhni Novgorod State Technical University, Nizhni Novgorod 603950, Russia;6. St. Petersburg State Marine University, St. Petersburg 190008, Russia;7. EvoLogics GmbH, Berlin, Germany;1. Instituto de Física Teórica, Universidade Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz 271, 01140-070 São Paulo, SP, Brazil;2. Astrophysics Science Division, NASA Goddard Space Flight Center, Greenbelt, MD 20771, United States;1. Instituto de Ciência e Tecnologia, Universidade Federal de Alfenas, Rodovia José Aurélio Vilela, 11999, Cidade Universitária, CEP 37715-400, Poços de Caldas, MG, Brazil;2. Escola de Ciência e Tecnologia, Universidade Federal do Rio Grande do Norte, Campus Universitário, s/n, CEP 59072-970, Natal, Brazil
Abstract:We consider an array of scintillation detectors combined with an array of water Cherenkov detectors designed to simultaneously measure the cosmic-ray primary mass composition and energy spectrum at energies around 1EeV. In this work we investigate the sensitivity to primary mass composition of such combined arrays. The water Cherenkov detectors are arranged in a triangular grid with fixed 750m spacing and the configuration of the scintillation detectors is changed to study the impact of different configurations on the sensitivity to mass composition. We show that the performance for composition determination can be compared favorably to that of fluorescence measurements after the difference in duty cycles is considered.
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