We present a precise measurement of downward going albedo proton fluxes for kinetic energy above ∼70 MeV performed by the Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics (PAMELA) experiment at an altitude between 350 and 610 km. On the basis of a trajectory tracing simulation, the analyzed protons were classified into quasi-trapped, concentrating in the magnetic equatorial region, and untrapped spreading over all latitudes, including both short-lived (precipitating) and long-lived (pseudotrapped) components. In addition, features of the penumbra region around the geomagnetic cutoff were investigated in detail. PAMELA results significantly improve the characterization of the high-energy albedo proton populations at low-Earth orbits.
Reentrant albedo proton fluxes measured by the PAMELA experiment / O., Adriani; G. C., Barbarino; G. A., Bazilevskaya; R., Bellotti; M., Boezio; E. A., Bogomolov; M., Bongi; V., Bonvicini; S., Bottai; A., Bruno; F., Cafagna; D., Campana; P., Carlson; M., Casolino; G., Castellini; C., De Donato; C., De Santis; N., De Simone; V., Di Felice; V., Formato; A. M., Galper; A. V., Karelin; S. V., Koldashov; S., Koldobskiy; S. Y., Krutkov; A. N., Kvashnin; A., Leonov; V., Malakhov; L., Marcelli; M., Martucci; A. G., Mayorov; W., Menn; M., Mergé; V. V., Mikhailov; E., Mocchiutti; A., Monaco; N., Mori; Munini, Riccardo; G., Osteria; F., Palma; B., Panico; P., Papini; M., Pearce; P., Picozza; M., Ricci; S. B., Ricciarini; R., Sarkar; V., Scotti; M., Simon; R., Sparvoli; P., Spillantini; Y. I., Stozhkov; A., Vacchi; E., Vannuccini; G. I., Vasilyev; S. A., Voronov; Y. T., Yurkin; G., Zampa; N., Zampa. - In: JOURNAL OF GEOPHYSICAL RESEARCH. SPACE PHYSICS. - ISSN 2169-9402. - STAMPA. - 120:5(2015), pp. 3728-3738. [10.1002/2015JA021019]
Reentrant albedo proton fluxes measured by the PAMELA experiment
MUNINI, RICCARDO;
2015-01-01
Abstract
We present a precise measurement of downward going albedo proton fluxes for kinetic energy above ∼70 MeV performed by the Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics (PAMELA) experiment at an altitude between 350 and 610 km. On the basis of a trajectory tracing simulation, the analyzed protons were classified into quasi-trapped, concentrating in the magnetic equatorial region, and untrapped spreading over all latitudes, including both short-lived (precipitating) and long-lived (pseudotrapped) components. In addition, features of the penumbra region around the geomagnetic cutoff were investigated in detail. PAMELA results significantly improve the characterization of the high-energy albedo proton populations at low-Earth orbits.Pubblicazioni consigliate
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