Precise measurements of electron and positron fluxes in energy range from 80 MeV to several GeV below the geomagnetic cutoff rigidity were carried out using the PAMELA magnetic spectrometer. The instrument was launched on June 15th 2006 onboard the Resurs-DK satellite on an orbit with 70 degrees inclination and 350-600 km altitude. PAMELA is collecting data since then. The procedure of trajectories calculations in the geomagnetic filed gives a way to separate stably trapped and albedo components produced in interactions of cosmic ray protons with the residual atmosphere. In this work spatial distributions of secondary electrons and positrons in the near Earth space, including the South Atlantic Anomaly, are presented. Altitudinal, latitudinal, longitudinal and temporal dependencies of the fluxes are discussed. These results are particularly interesting for accurate definition of radiation models on the low Earth orbits.
Secondary positrons and electrons observed by PAMELA spectrometer / Mikhailov, V.; Mocchiutti, E.; Adriani, O.; Barbarino, G. C.; Bazilevskaya, G. A.; Bellotti, R.; Boezio, M.; Bogomolov, E. A.; Bongi, M.; Bonvicini, V.; Bottai, S.; Bruno, A.; Cafagna, F.; Campana, D.; Carlson, P.; Casolino, M.; Castellini, G.; De Donato, C.; De Santis, C.; De Simone, N.; Di Felice, V.; Formato, V.; Galper, A. M.; Karelin, A. V.; Koldashov, S. V.; Koldobskiy, S.; Krutkov, S. Y.; Kvashnin, A. N.; Leonov, A.; Malakhov, V.; Marcelli, L.; Martucci, M.; Mayorov, A. G.; Menn, W.; Merge, M.; Mikhailov, V. V.; Mocchiutti, E.; Monaco, A.; Mori, N.; Munini, R.; Osteria, G.; Palma, F.; Bpanico, B.Panico; Papini, P.; Pearce, M.; Picozza, P.; Ricci, M.; Ricciarini, S. B.; Sarkar, R.; Scotti, V.; Simon, M.; Sparvoli, R.; Spillantini, P.; Stozhkov, Y. I.; Vacchi, A.; Vannuccini, E.; Vasilyev, G.; Voronov, S. A.; Yurkin, Y. T.; Zampa, G.. - In: POS PROCEEDINGS OF SCIENCE. - ISSN 1824-8039. - ELETTRONICO. - ICRC2015:(2015), pp. 243-1-243-6.
Secondary positrons and electrons observed by PAMELA spectrometer
ADRIANI, OSCAR;BONGI, MASSIMO;MORI, NICOLA;SPILLANTINI, PIERO;
2015
Abstract
Precise measurements of electron and positron fluxes in energy range from 80 MeV to several GeV below the geomagnetic cutoff rigidity were carried out using the PAMELA magnetic spectrometer. The instrument was launched on June 15th 2006 onboard the Resurs-DK satellite on an orbit with 70 degrees inclination and 350-600 km altitude. PAMELA is collecting data since then. The procedure of trajectories calculations in the geomagnetic filed gives a way to separate stably trapped and albedo components produced in interactions of cosmic ray protons with the residual atmosphere. In this work spatial distributions of secondary electrons and positrons in the near Earth space, including the South Atlantic Anomaly, are presented. Altitudinal, latitudinal, longitudinal and temporal dependencies of the fluxes are discussed. These results are particularly interesting for accurate definition of radiation models on the low Earth orbits.
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