Kenichi Sakai
(NASA/GSFC/CRESST/UMBC)
31/07/2015, 14:00
CR-EX
Oral contribution
The energy spectra of cosmic-ray protons and helium near solar minimum were precisely measured with BESS-Polar II (Balloon-borne Experiment with a Superconducting Spectrometer) during a long-duration flight over Antarctica in December 2007 and January 2008.The absolute fluxes and spectral shapes of primary protons and helium probe the origin and the propagation history of cosmic rays in the...
Dr
Nicolas PICOT-CLEMENTE
(Institute for Physical Science and Technology, University of Maryland)
31/07/2015, 14:15
CR-EX
Oral contribution
The Balloon-Borne Experiment with a Superconducting Spectrometer (BESS-Polar II) flew successfully over Antarctica for 24.5 days in December 2007 through January 2008 during a period of minimum Solar activity. BESS-Polar II is configured with a solenoidal superconducting magnet and a suite of various particle detectors. It allows to accurately identify hydrogen and helium isotopes among the...
Vitaly Choutko
(Massachusetts Inst. of Technology (US))
31/07/2015, 14:30
CR-EX
Oral contribution
A precision measurement of the proton flux in primary cosmic rays with rigidity 1 GV to 1.8 TV is presented based on 300 million events. The results show that proton flux is smooth and exhibits no sharp structures with rigidity. The detailed variation with rigidity of the flux spectral index is presented for the first time. The spectral index is progressively hardening at high rigidities.
Sadakazu Haino
(Academia Sinica (TW))
31/07/2015, 14:45
CR-EX
Oral contribution
A precision measurement of the Helium flux in primary cosmic rays with rigidity 2 GV to 3 TV is presented based on 50 million events. The detailed variation with rigidity of the spectral index is presented for the first time. The helium spectral index is progressively hardening at high rigidities. The precise ratio of the proton to Helium flux is also presented. Surprisingly, above ~25 GV...
Mr
David Michael Green
(UMD/NASA)
31/07/2015, 15:00
CR-EX
Oral contribution
The Pass 8 gamma-ray simulation and reconstruction package for the Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope
has dramatically enhanced the ability of the LAT to perform gamma-ray science. The Pass 8 improvements have also allowed for the development
of a new cosmic-ray proton analysis. Using the new Pass 8 direction and energy reconstruction, we create a new proton...
Sergey Koldobskiy
(NRNU MEPhI)
31/07/2015, 15:15
CR-EX
Oral contribution
The results of measurements of trapped and albedo cosmic ray deuteron fluxes obtained in the PAMELA experiment are presented in this work. The PAMELA is an international experiment aimed to measurements of cosmic ray particle fluxes in wide energy range. In particular, Analysis of PAMELA data gives possibility to identify deuterons and then to reconstruct deuteron spectra of different origin...
