IOP : Spatial resolution improvements with finer-pitch GEMs

Flöthner, K.J.; Garcia, F.; Muller, H.; Oliveri, E.; Ketzer, B.; Samarati, J.; Brunbauer, F.; Orlandini, G.; Janssens, D.; Veenhof, R.; Pfeiffer, D.; Brask, A.; Van Stenis, M.; Ropelewski, L.; Lisowska, M.; Scharenberg, L.

doi:10.1088/1748-0221/19/07/P07027

Article
Report number	arXiv:2406.05836
Title	Spatial resolution improvements with finer-pitch GEMs
Author(s)	Flöthner, K.J. (CERN ; Bonn U., HISKP) ; Scharenberg, L. (CERN) ; Brask, A. (Aarhus U. (main) ; CERN) ; Brunbauer, F. (CERN) ; Garcia, F. (Helsinki Inst. of Phys.) ; Janssens, D. (CERN) ; Ketzer, B. (Bonn U., HISKP) ; Lisowska, M. (CERN ; U. Paris-Saclay) ; Muller, H. (CERN ; Bonn U.) ; Oliveri, E. (CERN) ; Orlandini, G. (CERN ; U. Erlangen-Nuremberg (main)) ; Pfeiffer, D. (ESS, Lund) ; Ropelewski, L. (CERN) ; Samarati, J. (ESS, Lund) ; Van Stenis, M. (CERN) ; Veenhof, R. (CERN)
Publication	2024-07-24
Imprint	2024-06-09
Number of pages	11
In:	JINST 19 (2024) P07027
DOI	10.1088/1748-0221/19/07/P07027
Subject category	physics.ins-det ; Detectors and Experimental Techniques
Abstract	Gas Electron Multipliers (GEMs) are used in many particle physics experiments, employing their 'standard' configuration with amplification holes of 140 um pitch in a hexagonal pattern. However, the collection of the charge cloud from the primary ionisation electrons from the drift region of the detector into the GEM holes affects the position information from the initial interacting particle. In this paper, the results from studies with a triple-GEM detector with an X-Y-strip readout anode are presented. It is demonstrated that GEMs with a finer hole pitch of here 90 um improve the detector's spatial resolution. Within these studies, also the impact of the front-end electronics on the spatial resolution was investigated, which is briefly discussed in the paper.
Copyright/License	publication: © 2024 The Author(s) (License: CC-BY-4.0) preprint: (License: CC BY 4.0)