Author/Authors :
Kazui، نويسنده , , K and Watanabe، نويسنده , , A and Osone، نويسنده , , S and Cheon، نويسنده , , B.G and Fukushima، نويسنده , , M and Hayashii، نويسنده , , H and Hu، نويسنده , , X.Q and Ichizawa، نويسنده , , S and Igarashi، نويسنده , , S and Ikeda، نويسنده , , H and Kaneyuki، نويسنده , , K and Lee، نويسنده , , M.H and Miyabayashi، نويسنده , , K and Noguchi، نويسنده , , S and Sagawa، نويسنده , , H and Satpathy، نويسنده , , A and Suzuki، نويسنده , , R and Tamai، نويسنده , , K and Tsukamoto، نويسنده , , T and Watanabe، نويسنده , , Y and Zhong، نويسنده , , X.C، نويسنده ,
Abstract :
The radiation hardness of prototype CsI(Tl) crystals has been tested for the barrel electromagnetic calorimeter for the BELLE detector of the KEK B factory. Although samples made by one of the producers were found to be soft under irradiation, the problem was quickly improved when this information was fed back. All the tested crystals were found to meet our requirement.
ght output was found to be almost uniform along a crystal, even when the front part was damaged by radiation. The damage causes a degradation of the attenuation length due to the formation of color centers; this conclusion was confirmed by a Monte Carlo ray-tracing study.
