Author/Authors :
Fraga، نويسنده , , M.M.F.R and Fraga، نويسنده , , F.A.F and Fetal، نويسنده , , S.T.G. and Margato، نويسنده , , L.M.S. and Marques، نويسنده , , R.Ferreira and Policarpo، نويسنده , , A.J.P.L.، نويسنده ,
Abstract :
Light emitted during the development of electron avalanches in a gas electron multiplier (GEM) can be efficiently used for optical readout of the detector. We report on measurements of total light yields in Ar/CF4, He/CF4, Ar/TEA and Xe/TEA mixtures. Information on the energy resolution obtained with low-energy X-ray photons is also presented. The spectral distribution of the light produced in the GEM is analysed and the mechanisms associated with the process of light production are considered.
