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Title: Quality control of GEM detectors using scintillation techniques
Authors: Fraga, F. A. F. 
Fetal, S. T. G. 
Marques, R. Ferreira 
Policarpo, A. J. P. L 
Keywords: GEM detectors; Microstructures
Issue Date: 2000
Citation: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 442:1-3 (2000) 417-422
Abstract: Non-destructive quality control of microstructures at the manufacturing stage is an important issue in the foreseen use of huge numbers of such gaseous detectors in the future high luminosity colliders. In this work we report on the use of the scintillation light emitted by the avalanches in GEM channels for checking defects in the foils. The test system is described and data on the relative efficiency of several gaseous mixtures are presented. The foil images obtained with a low-noise CCD system are analysed and compared with the optical images obtained with an industrial inspection system of high magnification. The validity of this test method is established and possible extensions of its use are discussed.
DOI: 10.1016/S0168-9002(99)01266-8
Rights: openAccess
Appears in Collections:FCTUC Física - Artigos em Revistas Internacionais

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