ICRC2015

Session

Parallel CR09 EAS knee

1 Aug 2015, 11:00

World Forum

340. The energy spectrum of cosmic rays in the range from ${\mathbf{10}}^{\mathbf{14}}$ to ${\mathbf{10}}^{\mathbf{18}}\mathbf{\text{eV}}$

Mr Sven Schoo (KIT)

01/08/2015, 11:00

CR-EX

Oral contribution

The KASCADE experiment and its extension KASCADE-Grande have significantly contributed to the current knowledge about the energy spectrum and composition of cosmic rays (CRs) with energies between the knee and the ankle. However, the data of both experiments were analysed separately, although Grande used the muon information of the KASCADE-array. A coherent analysis based on the combined data...

45. Energy spectrum of the primary cosmic rays in the range 10\,GV--10\,TV

Mr BALAKRISHNAN HARI HARAN (HECR Group, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400 005, India and GRAPES-3 Experiment, Cosmic Ray Laboratory, Ooty 643 001, India)

01/08/2015, 11:15

CR-EX

Oral contribution

The GRAPES-3 experiment measures directional flux 1 GeV muons with very high precision. For a precise simulation of the measured flux of 1GeV muons in GRAPES-3, the energy spectrum of primary cosmic rays should be accurately known. We have used the data from several balloon and satellite based experiments to determine the proton and helium spectrum in the energy range from 10GV to 10TV. Since...

1181. Observation of primary cosmic rays with the new Tibet hybrid experiment(YAC-II + Tibet-III + MD))

Prof. Jing Huang (Institute of High Energy Physics, CAS), for the Tibet ASgamma Collaboration for the Tibet ASgamma Collaboration (Institute of High Energy Physics, CAS)

01/08/2015, 11:30

CR-EX

Oral contribution

We have started a new hybrid air shower experiment in Yangbajing (4300m a.s.l.) in Tibet since February 2014. This new hybrid experiment consists of the YAC-II comprising of 124 core-detectors placed on a grid of about 500 m2, the Tibet-III AS array with the total area of about 50000 m2 and the underground MD array comprising of 5 clusters with 800 m2 each below underground 2.5m. This...

315. Observation of a knee in the p+He energy spectrum below 1 PeV by using an hybrid measurement with ARGO-YBJ and a LHAASO Cherenkov Telescope

Dr Zhang Shoushan (Institute of High Energy Physics)

01/08/2015, 11:45

CR-EX

Oral contribution

The measurement of cosmic ray energy spectra, in particular for individual species, is an essential approach in finding their origin. Locating the “knees” of the spectra is an important part of the approach and has yet to be achieved. Here we report a measurement of the mixed Hydrogen and Helium spectrum using the combination of the ARGO-YBJ experiment and of a prototype Cherenkov telescope...

917. Observation of a knee in the p+He energy spectrum below 1 PeV by measuring particle densities very close to the EAS core with the ARGO-YBJ experiment

Ivan De Mitri (Univ. of Salento and INFN, Lecce, Italy)

01/08/2015, 12:00

CR-EX

Oral contribution

The CR spectrum has been studied by the ARGO-YBJ experiment in a wide energy range (TeVs→ PeVs) . This study is particularly interesting because not only it allows a better understanding of the so called ’knee’ of the energy spectrum and of its origin, but also provides a powerful cross-check among very different experimental techniques. The unique detector features (full coverage, time...

961. Observation of a knee in the p+He energy spectrum below 1 PeV by using a bayesian technique for the data analysis of the ARGO-YBJ experiment.

Paolo Montini (INFN Roma Tor Vergata)

01/08/2015, 12:15

CR-EX

Oral contribution

The measurement of the cosmic ray (CR) spectrum plays a fundamental role in the understanding of the production and acceleration mechanisms of high energy CR. Moreover the determination of the CR composition at energies > 100 TeV could provide a better understanding of the origin of the knee in the all-particle CR spectrum. The ARGO-YBJ experiment is a full coverage air shower detector...