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Title: The scintillation of GEMS coated with wavelength shifters
Authors: Fraga, F. A. F. 
Fetal, S. T. G. 
Fraga, M. M. F. R. 
Balau, E. F. S. 
Margato, L. M. S. 
Marques, R. Ferreira 
Policarpo, A. J. P. L 
Sauli, F. 
Keywords: GEM detectors; Wavelength shifter; Scintillation
Issue Date: 2004
Citation: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 525:1-2 (2004) 57-61
Abstract: The optical readout of GEMs, presented a few years ago, is currently being considered for several detector projects. Although using suitable gaseous mixtures the GEM avalanches emit a large number of photons in the visible and/or NIR regions, many gaseous mixtures of great interest for detectors scintillate mainly in the UV, and the readout of these detectors is usually inefficient or very expensive. In this work we report on the operation of GEMs coated with a wavelength converter. We show that using a GEM with an optimal geometry the wavelength conversion process can be quite efficient and does not degrade the intrinsic position resolution of the detector, an usual drawback of the utilisation of wavelength shifters.
DOI: 10.1016/j.nima.2004.03.189
Rights: openAccess
Appears in Collections:FCTUC Física - Artigos em Revistas Internacionais

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