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Volume 301 - 35th International Cosmic Ray Conference (ICRC2017) - Session Cosmic-Ray Direct. CRD- direct measurements
Measurement of Cosmic-Ray Nuclei with the Third Flight of the CREAM Balloon-Borne Experiment
J. Smith,* Y. Amare, T. Anderson, D. Angelaszek, N. Anthony, K. Cheryian, G.H. Choi, M. Copley, S. Coutu, L. Derome, L. Eraud, L. Hagenau, J.H. Han, H.G. Huh, S. Im, J.A. Jeon, S. Jeong, K.C. Kim, M.H. Kim, H.Y. Lee, J. Lee, M.H. Lee, J. Liang, J.T. Link, L. Lutz, A. Menchaca-Rocha, T. Mernik, J.W. Mitchell, S.I. Mognet, S. Morton, M. Nester, S. Nutter, O. Ofoha, I.H. Park, N. Picot-Clemente, R. Quinn, E.S. Seo, P. Walpole, R.S.P. Weinmann, J. Wu, Y.S. Yoon, L. Lu
*corresponding author
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Pre-published on: 2017 August 16
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The balloon-borne Cosmic Ray Energetics And Mass experiment had its third flight (CREAM-III) over Antarctica for 29 days from December 17, 2007 to January 19, 2008. CREAM-III was designed to directly measure the elemental spectra of cosmic-ray nuclei from Hydrogen to Iron in the energy range from 10^12 to 10^15 eV. Energy of incident cosmic rays was measured with a calorimeter that consisted of a densified carbon target directly above a stack of 20 alternating layers of tungsten and scintillating fiber ribbons. Multiple charge measurements were independently made with the silicon charge detector (SCD), Cherenkov Camera (CherCam), and a Timing Charge Detector (TCD) in order to identify particles and minimize backscattering effects from the calorimeter. Compared to previous CREAM flights, the electronic noise of CREAM-III was reduced, significantly lowering the energy threshold. Results from on-going analysis of the energy spectra will be presented.
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