Reducing Ion Backflow with a novel MPGD structure using a bulked micro-mesh on a GEM

Due to their simplicity and accuracy for reconstructing particle trajectories, Micromegas (Micro-MEsh-GAseous Structure) and Gas Electron Multiplier (GEM) detectors are commonly used as readout systems in Time Projection Chambers (TPCs). The main limitation of these two types of detectors is the ion...

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Veröffentlicht in:	Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2023-06, Vol.1051, p.168134, Article 168134
Hauptverfasser:	Glaenzer, A., Aune, S., Benoit, T., Bossù, F., Ribas, E. Ferrer, Vandenbroucke, M.
Format:	Artikel
Sprache:	eng
Schlagworte:	Gaseous detector GEM IBF Instrumentation and Detectors Ion backflow Micromegas MPGD Physics TPC
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container_start_page	168134
container_title	Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment
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creator	Glaenzer, A. Aune, S. Benoit, T. Bossù, F. Ribas, E. Ferrer Vandenbroucke, M.
description	Due to their simplicity and accuracy for reconstructing particle trajectories, Micromegas (Micro-MEsh-GAseous Structure) and Gas Electron Multiplier (GEM) detectors are commonly used as readout systems in Time Projection Chambers (TPCs). The main limitation of these two types of detectors is the ion backflow (IBF), which may result in space charge in a TPC. We present in this article a new Micro-Pattern Gaseous Detector (MPGD) structure, which combines a micro-mesh and a set made of a GEM surmounted by a micro-mesh at only a few hundreds μm above. We report the performance results of two prototypes using this new structure, and compare them to a single Micromegas and a hybrid detector composed of a Micromegas and a GEM with a few millimeters gap. Finally, we show that this new detector is capable of reducing the ion backflow to less than 0.2% for a total gain of around 2000.
doi_str_mv	10.1016/j.nima.2023.168134
format	Article
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subjects	Gaseous detector GEM IBF Instrumentation and Detectors Ion backflow Micromegas MPGD Physics TPC
title	Reducing Ion Backflow with a novel MPGD structure using a bulked micro-mesh on a GEM
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