May 24 – 28, 2021
America/Vancouver timezone

Characterization and Calibration of a Triple-GEM Detector for Medical Dosimetry

May 25, 2021, 5:00 AM
Poster Sensors: Gaseous Detectors Sensor Posters: Gaseous Detectors


Andrea Velasquez Moros


We characterized and calibrated a triple Gas Electron Multiplier (triple-GEM) detector, and studied its possible applications in medical dosimetry. The response to various sources of radiation was analyzed, and its efficiency, gain, energy resolution, and time resolution were calculated. Then, radiation doses from an Iron-55 source and a medical portable X-ray machine were measured, obtaining the calibration factor for the GEM detector by comparison with reference values.

We found an energy resolution of $19.5\%$, a time resolution of $40$ns, and a maximum gain of $5\times10^6$. The detector's response to dose measurements was linear, with a calibration coefficient of $1.13\times10^4$ for different sources of radiation. It was concluded that GEM detectors can be reliably used as dosimeters in nuclear medicine and radiology.

TIPP2020 abstract resubmission? No, this is an entirely new submission.

Primary author


Dr Hector Castro (Universidad Nacional de Colombia)

Presentation materials