The Yangbajain Experimental Study Primary Cosmic Ray Moon Shadow

Yangbajing cosmic ray observatory is currently one of two observation stations in the world only using EAS particle detection technology. With the capacity of large field of view and near 100% duty circle, they are particularly suitable for the study of cosmic ray. The main purpose of this paper is to investigate the moon shadow caused by the primary cosmic ray detected by ASγand ARGO experiment.The primary cosmic ray particles would be obscured by the moon in the process spreading toward the earth to cause deficiencies in the corresponding direction of the moon when we detect the secondary cosmic ray. This is the moon shadow effect. And the magnetic field will "shadow" from its position as the shadow of the moon.The information on array structure, character and data of ASγTibet-III are included in this paper. 16σsignificance moon shadow is observed by analyzing data from Phase1 with Equi-zenith method. Fitting shadow of the moon to see the deviation and extend of the moon shadow from the magnetic modulation effect. We calibrate the energy of cosmic ray, check the angle resolution of the array and estimate the array system error in direction by using the degree of deviation depended on the energy in size of the primary particles.For the just-completed ARGO experiment, based on introducing ARGO detector array, RPC structure and working principle, Experimental environment and the data acquisition system, we propose the physical target of the ARGO experiment. The significance of 5 .48σis obtained with analysis of data by taking from 42Cluster.Finally simulation of the moon shadow and attempts to improve the significance of the shadow been done, Looking forward to the bright prospects and unique advantage of the Yangbajing Experimental Station.