# Characterization of a triple-GEM position sensitive detector for X-ray fluorescence imaging

## TL;DR

This paper presents the characterization of a triple-GEM gaseous detector for X-ray fluorescence imaging, demonstrating high gain, good energy and position resolution, suitable for precise X-ray detection.

## Contribution

The work introduces a novel triple-GEM detector with resistive charge division readout for improved X-ray imaging performance.

## Key findings

- Achieved detector gain above 10^4
- Energy resolution of 15.28% at 5.9 keV
- Position resolution of 1.2 mm

## Abstract

In this work we characterized a X-ray position sensitive gaseous detector based in a triple stack of gas electron multipliers (GEM). The readout circuit is divided in 256 strips for each dimension and using a resistive chain interconnecting the strips, we are able to reconstruct the radiation interaction points by resistive charge division. The detector achieved gains above $10^4$, energy resolution of 15.28% (FWHM) for 5.9keV X-rays, and position resolution of 1.2mm, while operating in Ar/CO$_2$(90/10) at atmospheric pressure.