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Solar modulation of galactic protons and helium with the PAMELA experiment
- Publication Year :
- 2014
-
Abstract
- PAMELA has been orbiting the Earth for more than six years, gathering data on solar, galactic and trapped cosmic rays during the time of the last solar minimum. The apparatus comprises a time-of-flight system, a silicon-microstrip magnetic spectrometer, a silicon-tungsten electromagnetic calorimeter, an anticoincidence system, a shower tail catcher scintillator and a neutron detector. The combination of these devices allows charged particle and antiparticle identification over a wide energy range and with an unprecedented precision. The quasi-polar orbit of the instrument, with an inclination of 70 degrees, makes it possible to measure low energy particles starting from about 100 MeV/n. In this work we present the time and rigidity dependence of the galactic proton and helium fluxes over the first 4 years of operation during the A < 0 solar minimum of solar cycle 23.
- Subjects :
- Solar minimum
Physics
Proton
PAMELA detector
Spectrometer
Physics::Instrumentation and Detectors
solar modulation
Astrophysics::High Energy Astrophysical Phenomena
Solar cycle 23
chemistry.chemical_element
Cosmic ray
Astrophysics
Charged particle
law.invention
PAMELA, cosmic rays, proton, solar modulation
chemistry
cosmic rays
law
PAMELA
Astrophysics::Earth and Planetary Astrophysics
Helium
proton
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....1ddfa0a599b4c91bf5fc6899eea4766d