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Mario Bertaina (Universita' di Torino, Italy)21/06/2007, 09:00The KASCADE-Grande experiment, located at Forschungszentrum Karlsruhe, is a multi-component extensive air-shower experiment to study cosmic rays and their interactions at primary energies 10^14-10^18eV. After detailed investigations of the knee in the spectrum with the original KASCADE experiment, the main goal of the extended Grande array is the detection of the expected iron knee in the...Go to contribution page
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Rostislav Kokoulin (Moscow Engineering Physics Institute, Russia)21/06/2007, 09:15A new method of EAS investigations based on a new phenomenological variable - local muon density at the observation point - is discussed. It is shown that local muon density spectra are sensitive to primary spectrum shape, primary composition and hadronic interaction model. Ground level measurements of muon density spectra in a wide range of zenith angles provide the possibility to study EAS...Go to contribution page
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Francesco Salamida (University of L'Aquila and INFN, Italy)21/06/2007, 09:30The Pierre Auger Observatory detects ultra-high energy cosmic rays by implementing two complementary air-shower measurements. The combination of the single tank information from the surface detector (SD) and the calorimetric measurements of the shower profile using the fluorescence detector (FD), known as the "hybrid" technique, provides a more reliable event reconstruction than using either...Go to contribution page
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Heiko Geenen (University of Wuppertal, Germany)21/06/2007, 09:45The Pierre Auger Observatory is the largest extensive air-shower (EAS) experiment in the world. The aim of the experiment is to determine the energy, composition and origin of the UHE cosmic-rays above 1 EeV using two complementary detection techniques: a ground array of water Cherenkov tanks and fluorescence detectors. The fluorescence detectors are fully operational since February 2007....Go to contribution page
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Tristano Di Girolamo (Universita' di Napoli "Federico II")21/06/2007, 10:00The ARGO-YBJ experiment has been designed to decrease the energy threshold of typical Extensive Air Shower arrays by exploiting the high altitude and the full coverage, consisting of a 6700 m^2 carpet of Resistive Plate Chambers located at Yangbajing (Tibet, P.R. China, 4300 m a.s.l.). The low energy limit of the detector (~1 GeV) is reached with the "Scaler Mode", recording the counting rate...Go to contribution page
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Gus Sinnis (Los Alamos National Laboratory)21/06/2007, 10:15The Milagro Gamma-Ray Observatory is a water Cherenkov detector that operates continuously and detects extensive air showers from the overhead sky. The large field of view and long observation time of Milagro is ideal for surveying the Northern Hemisphere for TeV gamma ray sources. We report on a survey of the region of the Galactic plane visible from the Northern Hemisphere (30<220,-10<10)....Go to contribution page
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Zhen Cao (IHEP, Beijing, China)21/06/2007, 10:30Two CRTNT telescopes have been installed at Yangbajing, Tibet near the ARGO experiment for test run. Detector construction and test run status will be updated. Telescopes are positioned to at 60 degrees in elevation. Cerekov light from showers above 100TeV is measured and made coincidence with the ARGO experiment. Preliminary result and comparison with simulation will be reported.Go to contribution page
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Athina Meli (University of Athens, Physics Department, Greece)21/06/2007, 10:45The role of the diffusive particle acceleration in both non-relativistic and relativistic astrophysical shocks is reviewed and evaluated. We dicsuss the properties of these shocks and we further present Monte Carlo simulations especially studying the relativistic shocks efficiency in accelerating particles (i.e. protons or electrons) in astrophysical regions such as Super Novae, Active...Go to contribution page
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