Measurement of primary protons and electrons in the

Details Measurement of primary protons and electrons in the Measurement of primary protons and electrons in the

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....6.2219g&link_type=abstract

Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int

Physics

Scientific paper

A spacecraft borne magnetic spectrometer PAMELA is primarily aimed at measurement of antimatter particles with energy up to 2×1011 eV or 2×1011 eV /n. A modification of spectrometer is proposed to measure the primary protons and electrons in the energy range of 1011 1013 eV by addition of a neutron detector, consisting of 3 He counters enveloped by a polyethylene moderator. Particle energy is determined from the nuclear-electromagnetic cascades initiated in the PAMELA calorimeter by a primary particle. A separation between the primary proton and electron is implemented through an analysis of the cascade development and an evaluation of number of neutrons recorded in the neutron detector. Calculations show that the system of the PAMELA imaging calorimeter and the neutron detector allows to distinguish the primary electrons with energy 1011 -1013 eV from the proton flux with a rejection factor up to 10-4 .

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