Speaker
Dr
Juan Carlos Arteaga-Velázquez
(Instituto de Física y Matemáticas, Universidad Michoacana)
Description
The study of the cosmic ray energy spectrum in the interval 10^16 eV - 10^18 eV
results of particular importance for several reasons, one of them is the possible
existence of a second knee, other one is the possible presence of a galactic-extragalactic
transition in the cosmic ray flux and another one is the prediction from some
astrophysical models of a knee in the energy spectrum of the heavy component of galactic
cosmic rays. To address these questions precise measurements of the arrival direction,
energy and composition of cosmic rays in this energy regime need to be performed. For
this purpose the KASCADE-Grande air-shower detector was built at the place of the
Karlsruhe Institute of Technology. The detector covers a 0.5 km^2 surface with different
arrays of detectors which allows to measure simultaneously the charged and muon
components of the air-shower events. With this information a lot can be learned about
the composition and energy of the primary cosmic ray particles. In this talk, the
KASCADE-Grande detector is described and first results of the experiment are shown,
mainly about the all-particle cosmic ray energy spectrum in the energy region from
10^16 eV to 10^18 eV.
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Primary author
Dr
Juan Carlos Arteaga-Velázquez
(Instituto de Física y Matemáticas, Universidad Michoacana)