论文信息 - Measurement of the He nuclei flux at high energies with the PAMELA experiment

Measurement of the He nuclei flux at high energies with the PAMELA experiment

The PAMELA experiment is a satellitebased apparatus launched in June 2006. Its core instrument is a magnetic spectrometer, whose high spatial resolution (∼ 3 micron) provides the discriminative power to separate particles and antiparticles. It can measure the momentum and the energy-loss rate of an incident particles, thus allowing to identify higher charges (up to Z ≃ 5). The main goal for PAMELA is a precise measurement of the light antimatter component in cosmic rays (antiprotons, positrons), with unprecedented statistics and over a largely unexplored energy range. The instrument characteristics and the large statistics allow to precisely measure absolute fluxes for various cosmic-ray species up to high energy. Here the He flux analysis above some GeV is presented.

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[3] V. Malvezzi,et al. PAMELA: A payload for antimatter matter exploration and light-nuclei astrophysics - status and first results , 2006, 2007 IEEE Nuclear Science Symposium Conference Record.