Quality control of GEM detectors using scintillation techniques

Citation
Faf. Fraga et al., Quality control of GEM detectors using scintillation techniques, NUCL INST A, 442(1-3), 2000, pp. 417-422
Citations number
4
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
0168-9002 → ACNP
Volume
442
Issue
1-3
Year of publication
2000
Pages
417 - 422
Database
ISI
SICI code
0168-9002(20000311)442:1-3<417:QCOGDU>2.0.ZU;2-1
Abstract
Non-destructive quality control of microstructures at the manufacturing sta ge is an important issue in the foreseen use of huge numbers of such gaseou s 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 cha nnels for checking defects in the foils. The test system is described and d ata on the relative efficiency of several gaseous mixtures are presented. T he foil images obtained with a low-noise CCD system are analysed and compar ed with the optical images obtained with an industrial inspection system of high magnification. The validity of this test method is established and po ssible extensions of its use are discussed. (C) 2000 Elsevier Science B.V. All rights reserved.