MG12 - Talk detail
 

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Abstract

Observations of Cosmic rays of Galactic, Solar and Terrestrial origin with Pamela Experiment.

Pamela is a multi-purpose device composed of a permanent magnet spectrometer to provide particle charge, rigidity (with 10% resolution) and incoming angle information. A series of six segmented scintillator counters arranged at its extremities provides redundant Time-of-Flight and charge information. Lepton/hadron identification is performed by a Silicon-Tungsten calorimeter and a Neutron detector placed at the bottom of the device. In this work we will present measurements of protons of various nature in the energy range 100 MeV - 200 GeV. We will present differential energy spectra, the resulting solar modulation parameter in the solar quiet time 2006-2008 and the resulting extrapolation to interstellar spectrum and the relevance for antimatter research in space.We will also discuss differential energy spectra of the solar particle protons of December 2006 in the energy range 100 MeV – 4 GeV. Data have been gathered at an altitude between 350 and 600 km with Pamela detector. Data are provided with two minutes precision every polar passage. We will also discuss the effect of forbush decrease over galactic particles in the days 14-19 December 2006. Finally we will compare experimental data with various models and simulation taking into account the trapped radiation and trace-back of particles in the magnetosphere.

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