Solar modulation of the spectra of protons and helium nuclei in the PAMELA experiment
- 50 Downloads
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.
KeywordsParticle Flux Neutron Monitor Solar Modulation Helium Nucleus 23rd Solar Cycle
Unable to display preview. Download preview PDF.
- 2.Ginzburg, V.L., Astrophysics of Cosmic Rays, Moscow: Nauka, 1990.Google Scholar
- 3.Shikaze, Y., et al., Proc. 28th ICRC, Tsukuba, 2003, pp. 4027–4030.Google Scholar
- 6.Brun, R., et al., Detector Description and Simulation Tool, CERN Program Library, 1994.Google Scholar
- 9.Bazilevskaya, G.A., et al., Bull. Russ. Acad. Sci. Phys., 2011, no. 6, pp. 782–785.Google Scholar