Construction of a Gas Electron Multiplier (GEM) Detector for Medical Imaging

TL;DR

This paper reports on the development of a prototype Gas Electron Multiplier (GEM) detector designed for medical imaging, including its construction, circuitry, and preliminary testing results demonstrating improved signal counting rates.

Contribution

It introduces a new GEM detector prototype with specific circuitry and pad configuration tailored for medical imaging applications.

Findings

High voltage, low current circuit yields better x-ray signal counting.

Prototype GEM detector successfully assembled and tested.

Preliminary results indicate promising performance for medical imaging.

Abstract

A prototype Gas Electron Multiplier (GEM) detector is under construction for medical imaging purposes. A single thick GEM of size 10x10 cm^2 is assembled inside a square shaped air-tight box which is made of Perspex glass. In order to ionize gas inside the drift field two types of voltage supplier circuits were fabricated, and array of 2x4 pads of each size 4x8 mm^2 were utilized for collecting avalanche charges. Preliminary testing results show that the circuit which produces high voltage and low current is better than that of low voltage and high current supplier circuit in terms of x-ray signal counting rates.