ICRC2015

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

1 Aug 2015, 11:30

15m

Yangtze 2 (World Forum)

Oral contribution CR-EX Parallel CR09 EAS knee

Speakers

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)

Description

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 hybrid-array system is used to observe air showers of high energy celestial gamma-ray origin and those of nuclear-component origin. These measurements are essential to investigate the acceleration mechanism and propagation of primary cosmic rays in the Galaxy. Thanks to extremely low background level, it is expected to be capable of detecting a dozen new point-like gamma-ray sources and also diffuse gamma rays from the Galactic plane in the northern sky. In this talk, we will report the present status and main scientific goals of this new experiment, including the instrument configuration and performance.