Optical Scanning System for Quality Control of GEM-foils

Matti Kalliokoski, Timo Eero Hilden, Rauno Lauhakangas, Jouni Heino, Francisco Garcia, Eija Tuominen, Raimo Turpeinen

Research output: Contribution to journalArticleScientificpeer-review


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.
Original languageEnglish
JournalNuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
Issue number1
Pages (from-to)223-230
Number of pages8
Publication statusPublished - 1 Feb 2012
MoE publication typeA1 Journal article-refereed

Fields of Science

  • 114 Physical sciences

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