Optical scanning system for quality control of GEM-foils |
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| Authors: | M Kalliokoski T HildenF Garcia J HeinoR Lauhakangas E TuominenR Turpeinen |
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| Affiliation: | a Detector Laboratory at the Helsinki Institute of Physics, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland |
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| Abstract: | An optical scanning system was commissioned and further developed in the Detector Laboratory of Helsinki Institute of Physics and University of Helsinki. It was designed to automatically scan, perform on-line analysis and to classify the overall quality of GEM-foils especially of the GEM-TPC detectors for Super-FRS at FAIR. The optical scanning system consists of precision positioning table, lighting, optics and operating system with analysis software. It has active scanning area of 95×95 cm2 and it can study this area with the minimum resolution of 128 lp/mm. Performance of the system and first results from the GEM-foil uniformity and quality analysis are presented. |
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| Keywords: | Gas electron multiplier Quality control Optical scanning system |
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