We present the energy spectra of protons and helium nuclei of cosmic rays obtained in the PAMELA experiment on board the satellite RESURS-DK1 for the period from August 2006 to December 2009. The spectra were measured in the energy range of 100 MeV/nucleon to 100 GeV/nucleon using a magnetic spectrometer within the apparatus. Variations in the solar modulation potential for protons and helium nuclei were calculated on the basis of the monthly mean particle fluxes. A force field model was used to compare the modulation with measurements from balloon experiments, and with measurements from a network of neutron monitors.
|Number of pages||3|
|Journal||Bulletin of the Russian Academy of Sciences: Physics|
|State||Published - Jun 2011|
Bibliographical noteFunding Information:
ACKNOWLEDGMENTS The authors are grateful to the Russian Academy of Sciences’ Council on Outer Space; the Roskosmos Federal Space Agency; the TsSKB Progress State Research and Production Space Rocket Center; the Research Center for Real Time Earth Monitoring; the Italian Space Agency; the German Aerospace Center; the Swedish National Space Board; the Swedish Research Council; and the Russian Foundation for Basic Research, project nos. 10 02 01301a and 09 02 00394a.