Effect of hole geometry on charge sharing and other parameters in GEM-based detectors. (1st March 2022)

• Record Type: Journal Article
• Authors: Roy, P.; Bhattacharya, P.; Rout, P.K.; Mukhopadhyay, S.; Majumdar, N.; Sarkar, S.
• Is Part Of: Journal of instrumentation. Volume 17:Number 3(2022)
• Publication Date: 2022-03-01
• Subjects: Detector modelling and simulations II (electric fields, charge transport, multiplication and induction, pulse formation, electron emission, etc) -- Electron multipliers (gas) -- Gaseous detectors -- Micropattern gaseous detectors (MSGC, GEM, THGEM, RETHGEM, MHSP, MICROPIC, MICROMEGAS, InGrid, etc); Scientific apparatus and instruments -- Periodicals; 502.84
• DOI: 10.1088/1748-0221/17/03/P03016
• Languages: English
• ISSNs: 1748-0221

Abstract

Abstract: Gas Electron Multipliers (GEM) are among the more prominent Micro-Pattern Gaseous Detectors (MPGDs) and widely used in high energy particle physics experiments and various related applications. Adoption of different production techniques lead to holes of varying geometries in GEM foils. Since the response of a GEM-based detector is closely related to the hole geometry through the influence of the latter on charge sharing and transport through GEM foils, attempts have been made to relate hole configurations to different figures of merit of a detector. Numerical simulations have been performed to study the effects of hole geometry on important parameters such as charge sharing, collection efficiency, extraction efficiency, gain, possibility of transition from avalanche to streamer modes for single-, double- and triple-layer GEM detectors. The numerical estimates have been compared to available experimental data. The comparisons, although not always in agreement, are found to be generally encouraging.