22-24 May 2013
Physics Department, University "La Sapienza", Roma, Italy
Europe/Rome timezone

Multiparticle Analysis of Forbush Decrease of the 13th December 2006 Solar Event with the PAMELA Experiment

22 May 2013, 14:00
Aula Giorgio Careri (first floor) (Physics Department, University "La Sapienza", Roma, Italy)

Aula Giorgio Careri (first floor)

Physics Department, University "La Sapienza", Roma, Italy


Mr Matteo Mergè (INFN)


for the PAMELA Collaboration. PAMELA (Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics) is a space-borne experiment launched on 15 June 2006 and continuously collecting data since then. The apparatus measures electrons, positrons, protons, anti-protons and heavier nuclei from about 100 MeV to several hundreds of GeV. On-board instrumentation is built around a permanent magnet with a silicon microstrip tracker, providing charge and track deflection information. The PAMELA detectors allow a deep insight into the Forbush Decrease dynamics not possible with ground based experiments limited by atmosphere and geomagnetic field. The analysis focused on charge and mass dependence of the effect on main components of the cosmic rays. The detector allowed for the first time the observation of the effect on positrons. The recovery time rigidity dependence has been measured with unprecedented precision. Furthermore proton and helium differential flux spectral index hardening has been measured.

Primary author

Mr Matteo Mergè (INFN)

Presentation Materials