Köln 2025 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 23: Poster
HK 23.22: Poster
Dienstag, 11. März 2025, 17:30–19:00, Foyer Physik
GEM production and quality assurance at the FTD in Bonn — •Shania Müller1, Tim Schüttler1,2, Markus Ball1,2, Yevgen Bilevych2, Philip Hauer1,2, Dimitri Schaab2, and Bernhard Ketzer1,2 — 1Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn — 2Forschungs- und Technologiezentrum Detektorphysik, Universität Bonn
Gas Electron Multipliers (GEMs) are commonly used for amplification in modern gaseous detectors. A GEM consists of a 50 µm thick polyimide foil coated with copper layers of 5 µm on both sides in which microscopic holes are etched using photolithographic techniques.
A reliable process for producing standard 10 × 10 cm2 GEM foils was recently established at the Research and Technology Center Detector Physics (FTD) at Bonn University. The production process was developed in close cooperation with the CERN EP-DT-MPT group.
For the procedure the laboratories at the FTD offer wet benches, a dry film laminator and UV exposition machines. The processing infrastructure is hosted exclusively in clean rooms of classes ISO5-7.
With the equipment and the new procedure, it was possible to successfully produce several standard GEM foils and classify them using an established quality assurance procedure. Furthermore, the completed GEMs were installed in a test detector for a first series of measurements to investigate their properties. In this poster I will give an overview of the GEM production process and present the results of both the QA and test detector measurements.
Supported by BMBF.
Keywords: GEM; MPGD; Gaseous Detector