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HK: Fachverband Physik der Hadronen und Kerne

HK 27: Poster

HK 27.63: Poster

Dienstag, 28. März 2017, 16:45–18:45, F Foyer

Charge transfer properties of Gas Electron Multipliers — •Jonathan Ottnad, Markus Ball, Viktor Ratza, and Bernhard Ketzer — Helmholtz-Institut für Strahlen und Kernphysik, Bonn, DE

Gas Electron Multipliers (GEM) are state-of-the-art technology to achieve charge multiplication in gaseous detectors. While GEMs proved their reliable operation and excellent behaviour in terms of energy and spatial resolution and high rate capability in experiments like COMPASS, LHCb and others, the characteristics of the charge transfer and multiplication processes have not yet been studied in full detail.

The optimization of a GEM-based readout requires the study of several parameters. The GEM geometry as well as the electric field configuration influence the transfer of the charges. The poster shows the results of a set of systematic measurements for the electron charge transfer. The measurements are compared to the data of a microscopic simulation. Furthermore the agreement with the calculation of a charge density model is presented.

Supported by SFB/TR 16.