PAMELA Measurements of Cosmic-Ray Proton and Helium Spectra

@article{Adriani2011PAMELAMO,
  title={PAMELA Measurements of Cosmic-Ray Proton and Helium Spectra},
  author={Oscar Adriani and Giancarlo Barbarino and Galina Bazilevskaya and Roberto Bellotti and Mirko Boezio and {\'E}. A. Bogomolov and L. Bonechi and M. Bongi and Valter Bonvicini and Stanislav Borisov and Sergio Bottai and Alessandro Bruno and Francesco Saverio Cafagna and Donatella Campana and Rita Carbone and Per Carlson and Marco Casolino and Giovanni Castellini and Lucia Consiglio and M. P. De Pascale and Cristian De Santis and Nicola De Simone and Valeria Di Felice and Arkady Moiseev Galper and William Gillard and L. A. Grishantseva and G. Jerse and A. V. Karelin and Sergey Koldashov and S. Yu. Krutkov and A. N. Kvashnin and Alexey A. Leonov and Vitaly V. Malakhov and Valeria Malvezzi and L. Marcelli and Andrey G. Mayorov and W. Menn and V. V. Mikhailov and Emiliano Mocchiutti and Anthony P. Monaco and Nicola Mori and N. N. Nikonov and Giuseppe Osteria and Francesco Palma and Paolo Papini and Mark Pearce and Piergiorgio Picozza and Cecilia Pizzolotto and M. Ricci and Sergio Bruno Ricciarini and Laura Rossetto and Ritabrata Sarkar and Mary J. Simon and Roberta Sparvoli and P. Spillantini and Y. I. Stozhkov and Andrea Vacchi and Elena Vannuccini and G. I. Vasilyev and S. A. Voronov and Yu. T. Yurkin and J. J. Wu and Gianluigi Zampa and Nicola Zampa and V. G. Zverev},
  journal={Science},
  year={2011},
  volume={332},
  pages={69 - 72}
}
Satellite measurements challenge the current understanding of cosmic-ray acceleration and propagation in our Galaxy. Protons and helium nuclei are the most abundant components of the cosmic radiation. Precise measurements of their fluxes are needed to understand the acceleration and subsequent propagation of cosmic rays in our Galaxy. We report precision measurements of the proton and helium spectra in the rigidity range 1 gigavolt to 1.2 teravolts performed by the satellite-borne experiment… 
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