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The Space Mission Pamela represents a state-of-the-art of the investigation of the cosmic radiation, addressing the most compelling issues facing astrophysics and cosmology: the nature of the dark matter that pervades the universe, the apparent absence of cosmological antimatter, the origin and evolution of matter in the galaxy. Pamela PAMELA, a powerful particle identifier using a permanent magnet spectrometer with a variety of specialized detectors, is an instrument of extraordinary scientific potential that is measuring with unprecedented precision and sensitivity the abundance and energy spectra of cosmic rays electrons, positrons, antiprotons and light nuclei over a very large range of energy from 50 MeV to hundreds GeV, depending on the species. PAMELA has been put in an elliptical orbit at an altitude between 350 and 610 Km, on board of the Resurs-DK1 Russian satellite by a rocket Soyuz, on the 15th of June 2006. In September 2010 the orbit was changed to a nearby circular one, at an altitude of ≅ 570 km, and it has not changed since then.

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Particle flux

PAMELA results are available in a number of publications, providing new, precise information on the composition and energy spectrum of cosmic rays.
The matter and anti-matter components of cosmic rays have been extensively explored both in composition and in energy spectrum. Differential energy spectra of particles of galactic and solar origin, as well as trapped secondaries, have been measured. Moreover, over the long PAMELA data taking period, spectral evolution in time is being monitored, and both short and long term effects are being studied.
The figure shows a summary of the most significative and recent PAMELA measurements. Since October 2013 all the published data are public and available at ASDC, accessible for an easy visualization  



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Edited by Vincenzo Buttaro