Author/Authors :
Ozawa، نويسنده , , S and Shibata، نويسنده , , M and Katayose، نويسنده , , Y and Ohta، نويسنده , , I and Hotta، نويسنده , , N and Saito، نويسنده , , T and Wang، نويسنده , , X and Ouchi، نويسنده , , T and Huang، نويسنده , , J and Tsuchiya، نويسنده , , H and Ren، نويسنده , , J.R. and Lü، نويسنده , , S.L. and Zhang، نويسنده , , N.J. and Li، نويسنده , , J.Y and Zhang، نويسنده , , X.Y، نويسنده ,
Abstract :
A new method of emulsion chamber analysis by using an image scanner is developed in order to process a large number of X-ray films used in the Tibet hybrid experiment which is carried out to observe primary proton spectrum in the PeV region. The experimental procedure in this method consists of multiple steps of processing the image of the X-ray films, i.e. the detection of cascade showers induced by high-energy γ-rays, the noise reduction, the spatial reconstruction of γ-families and their energy determination. The quality of the results obtained by the new method is compared with that obtained by the current manual method or Monte Carlo simulations. It is shown that sufficiently high quality of the emulsion chamber analysis is realized by the automatic method both in energy and geometrical resolution.
Keywords :
Cosmic rays , Emulsion chambers , Chemical composition of primary cosmic rays , Automatic analysis
