2021 - SILVA, NATALIA F.; SILVA, TIAGO F.; CASTRO, MAYSA C.; LUZ, HUGO N. da; CALDAS, LINDA V.E.
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/CO2 mixture at atmospheric pressure.