Solar modulation of galactic hydrogen and helium over the 23rd solar minimum with the PAMELA experiment

• 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. 

Ämnesord

NATURVETENSKAP  -- Fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Nyckelord

Cosmic rays

Satellite-borne experiment

Solar modulation

Charged particles

Cosmology

Helium

Hydrogen

Modulation

Orbits

Particle detectors

Solar energy

Anticoincidence systems

Electromagnetic calorimeter

Low-energy particles

Magnetic spectrometers

Silicon micro-strip

Time of flight systems

Solar power generation

Publikations- och innehållstyp

ref (ämneskategori)

kon (ämneskategori)