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T: Fachverband Teilchenphysik

T 11: Gaseous Detectors I

T 11.4: Vortrag

Montag, 16. März 2026, 17:00–17:15, KH 01.014

Influence of gap parameters in a triple-GEM detector — Erik Ehlert, Kerstin Hoepfner, •Stella Israel, Daniel Klee, Markus Merschmeyer, Alexander Schmidt, and Shawn Zaleski — III. Physikalisches Institut A, RWTH Aachen University

Triple Gas Electron Multiplier (GEM) detectors are used in various ex- periments with different gap configurations, most notably 3/2/2/2 mm and 3/1/2/1 mm. While previous studies have shown that shorter drift gaps can improve the time resolution in different gas mixtures, a systematic comparison for the commonly used Ar/CO₂ (70/30) mixture is still missing. To investigate the influence on the signal, the gap spacings are varied in a dedicated 10×10 cm² test chamber.

This talk offers a first look into the comparison of the different gap configurations operated with the same electric fields. The aim is to clarify the role of the gap parameters in the signal formation of triple- GEM detectors.

Keywords: Gas Electron Multiplier; Gap Spacing