Garfield++ simulation of a TH-GEM based detector for standard mammography beam dosimetry

Abstract The TH-GEM based detector is a robust, simple to manufacture, high-gain gaseous electron multiplier. Its operation is based on a standard printed circuit board (PCB) coated on both sides by metallic material, perforated in a millimeter pattern, and immersed in gas. In order to study the fea...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 1826; no. 1; p. 12046
Main Authors Silva, Natália F., Silva, Tiago F., Castro, Maysa C., da Luz, Hugo N., Caldas, Linda V. E.
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.03.2021
Subjects
Circuit boards
Dosimeters
Dosimetry
Electric fields
Feasibility studies
High gain
Photomultiplier tubes
Physics
Printed circuits
Sensors
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Summary:Abstract The TH-GEM based detector is a robust, simple to manufacture, high-gain gaseous electron multiplier. Its operation is based on a standard printed circuit board (PCB) coated on both sides by metallic material, perforated in a millimeter pattern, and immersed in gas. In order to study the feasibility of using TH-GEM type detectors in dosimetric applications for standard mammography beams, a prototype with adequate dimensions and materials was produced. The present work encompasses the calculations of electric fields by the Gmsh and Elmer software packages and the avalanche simulation using Garfield++ library of a TH-GEM detector filled with Ar/CO 2 mixture at atmospheric pressure.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1826/1/012046