The PAMELA (Payload for Antimatter Matter Exploration and Light nuclei Astrophysics) experiment is a satellite-borne apparatus mounted on the Resurs DK1 Russian satellite, in orbit around the Earth since June 15th 2006. The apparatus is able to identify charge particles in the cosmic radiation, in the energy range E » 107 ¥ 1012 eV by using an array of detectors which includes a time-of-flight system, a magnetic spectrometer, a silicon-tungsten electromagnetic calorimeter. The identification of the charge Z of the incoming particle in the apparatus is performed independently by the three detectors. The tracker system provides good charge resolution for the protons and helium but only a partial resolution for heavier nuclei. A better charge resolution for nuclei (up to Carbon) can be obtained by the ToF system and, also for heavier nuclei, by the first layers of the calorimeter. Preliminary results on flux ratios of nuclei B/C that were obtained by using time of flight system as main charge detector are presented
Charge identification in the PAMELA experiment: Preliminary measurements of the B/C ratio / Osteria, G.; Adriani, O.; Barbarino, G.C.; Bazilevskaya, G.A.; Bellottik, R.; Boezio, M.; Bogomolov, E.A.; Bonechi, L.; Bongi, M.; Bonvicini, V.; Bottai, S.; Bruno, A.; Cafagna, F.; Campana, D.; Carlson, P.; Casolino, M.; Castellini, G.; De Santis, C.; De Simone, N. De Pascale; De Rosa, G.; Di Felice, V.; Galper, A.M.; Grishantseva, L.; Hofverberg, P.; Koldashov, S.V.; Krutkov, S.Y.; Kvashnin, A.N.; Leonov, A.; Marcelli, L.; Menn, W.; Mikhailov, V.V.; Mocchiutti, E.; Nikonov, N.; Papini, P.; Peroni, M.; Pearce, M.; Picozza, P.; Ricci, M.; Ricciarini, S.B.; Simon, M.; Sparvoli, R.; Spillantini, P.; Stozhkov, Y.I.; Vacchi, A.; Vannuccini, E.; Vasilyev, G.; Voronov, S.A.; Yurkin, Y.T.; Zampa, G.; Zampa, N.; Zverev, V.G.. - ELETTRONICO. - (2009), pp. 1-4. (Intervento presentato al convegno 31st International Cosmic Ray Conference, ICRC 2009).
Charge identification in the PAMELA experiment: Preliminary measurements of the B/C ratio
ADRIANI, OSCAR;BONGI, MASSIMO;
2009
Abstract
The PAMELA (Payload for Antimatter Matter Exploration and Light nuclei Astrophysics) experiment is a satellite-borne apparatus mounted on the Resurs DK1 Russian satellite, in orbit around the Earth since June 15th 2006. The apparatus is able to identify charge particles in the cosmic radiation, in the energy range E » 107 ¥ 1012 eV by using an array of detectors which includes a time-of-flight system, a magnetic spectrometer, a silicon-tungsten electromagnetic calorimeter. The identification of the charge Z of the incoming particle in the apparatus is performed independently by the three detectors. The tracker system provides good charge resolution for the protons and helium but only a partial resolution for heavier nuclei. A better charge resolution for nuclei (up to Carbon) can be obtained by the ToF system and, also for heavier nuclei, by the first layers of the calorimeter. Preliminary results on flux ratios of nuclei B/C that were obtained by using time of flight system as main charge detector are presented
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