First Results of a Scintillating GEM Detector for 2-D Dosimetry in an Alpha Beam

Enrica Seravalli,Jeffrey Hendrikse,Jan Huizenga,Rob Kreuger, J. Marco Schippers,Andrea Simon,Carel W. E. van Eijk

IEEE Transactions on Nuclear Science（2007）

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摘要

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.

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关键词

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,Dosimetry,gas electron multiplier (GEM),gas scintillation,ionization density

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