Elemental Spectra from the CREAM-I Flight

• Main Authors: Ahn, Hoseok, Allison, P S, Bagliesi, M G, Beatty, J J, Bigongiari, G, Boyle, P J, Childers, J T, Conklin, N B, Coutu, S, Duvernois, M A, Ganel, O, Han, J H, Jeon, J A, Kim, K C, Lee, J K, Lee, M H, Lutz, L, Maestro, P, Malinine, A, Marrocchesi, P S, Minnick, S, Mognet, S I, Nam, S, Nutter, S, Park, I H, Park, N H, Seo, E S, Sina, R, Swordy, S, Wakely, S P, Wu, J, Yang, J, Yoon, Y S, Zei, R, Zinn, S Y
• Language: English
• Published: 2007
• Subjects: Astrophysics and Astronomy; Antarc*; Antarctica
• Online Access: http://cds.cern.ch/record/2624410

The Cosmic Ray Energetics And Mass (CREAM) instrument is a balloon-borne experiment designed to measure the composition and energy spectra of cosmic rays of charge Z = 1 to 26 up to an energy of ∼1015 eV. CREAM had two successful flights on long-duration balloons (LDB) launched from McMurdo Station, Antarctica, in December 2004 and December 2005. CREAM achieves a substantial measurement redundancy by employing multiple detector systems, namely a Timing Charge Detector (TCD), a Silicon Charge Detector (SCD), and a Cherenkov Detector (CD) for particle identification, and a Transition Radiation Detector (TRD) and a sampling tungsten/scintillating-fiber ionization calorimeter (CAL) for energy measurement. In this paper, preliminary energy spectra of various elements measured with CAL/SCD during the first 42-day flight are presented.