Title :
First Results of a Scintillating GEM Detector for 2-D Dosimetry in an Alpha Beam
Author :
Seravalli, Enrica ; Hendrikse, Jeffrey ; Huizenga, Jan ; Kreuger, Rob ; Schippers, J. Marco ; Simon, Andrea ; Van Eijk, Carel W E
Author_Institution :
Stichting voor Fundamenteel Onderzoek der Materie, Utrecht
Abstract :
The characterization of a scintillating GEM based gas detector for quality control of clinical radio-therapeutic beams is presented. Photons emitted by the Ar/CF4 gas mixture are detected by means of a CCD camera; in addition, the charge is measured. The detector response has been studied as a function of alpha particle energy and dose rate. The measured signal underestimation, at the Bragg peak depth, is only few percent with respect to an air filled ionization chamber.
Keywords :
alpha-particle detection; dosimetry; electron multiplier detectors; gas mixtures; gas scintillation detectors; ionisation chambers; quality control; radiation therapy; 2-D dosimetry; Ar-CF4 - System; Bragg peak depth; CCD camera; air filled ionization chamber; alpha beam; alpha particle energy; clinical radiotherapeutic beam quality control; dose rate; gas mixture; gas scintillation; ionization density; scintillating gas electron multiplier detector; Alpha particles; Argon; Charge coupled devices; Charge measurement; Charge-coupled image sensors; Current measurement; Dosimetry; Gas detectors; Ionization chambers; Quality control; Dosimetry; gas electron multiplier (GEM); gas scintillation; ionization density;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2007.903179
