H and He spectra from the 2004/05 CREAM flight

• Main Authors: Y S Yoon, H S Ahn, P S Allison, M G Bagliesi, J J Beatty, G Bigongiari, P J Boyle, J T Childers, N B Conklin, S Coutu, M A Duvernois, O Ganel, J H Han, J A Jeon, K C Kim, J K Lee, M H Lee, L Lutz, P Maestro, A Malinin, P S Marrocchesi, S Minnick, S I Mognet, S Nam, S Nutter, I H Park, N H Park, E S Seo, R Sina, S Swordy, S Wakely, J Wu, J Yang, R Zei, S Y Zinn
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Antarctic; Antarc*
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1053.7859; http://alpha.sinp.msu.ru/%7Epanov/Lib/Papers/CR/CREAM2008-ICRC-55.pdf

Abstract: The balloon-borne Cosmic Ray Energetics And Mass (CREAM) payload flew for a recordbreaking 42 days during the 2004/05 Antarctic season. The instrument incorporates a tungsten/scintillating-fiber sampling calorimeter and graphite targets to measure energies of incident cosmic-ray nuclei. A finely segmented Silicon Charge detector (SCD) located above the targets is used for charge measurement. The position of the primary particle in the SCD is determined by a backward extrapolation of the reconstructed shower axis in the calorimeter. The flight data have been analyzed using the latest calibration of the calorimeter. The energy spectra of protons and helium nuclei, as well as their ratio, are presented in this paper.