A Large Area GEMPix detector for treatment plan verification in hadron therapy

Quality Assurance in hadron therapy is crucial to ensure a safe and accurate dose delivery to the patients. This requires fast and reliable detectors with high spatial resolution. A first LaGEMPix prototype that combines a triple Gas Electron Multiplier and a highly pixelated readout based on a matr...

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Bibliographic Details
Published in:Journal of physics. Conference series 2022-11, Vol.2374 (1), p.12177
Main Authors: Oliveira, Andreia Maia, Akkerman, Hylke B., Braccini, Saverio, van Breemen, Albert J.J.M., Manzano, Lucia Gallego, Heracleous, Natalie, Katsouras, Ilias, Leidner, Johannes, Murtas, Fabrizio, Peeters, Bart, Silari, Marco
Format: Article
Language:English
Subjects:
Backplanes
Foils
Photodiodes
Photomultiplier tubes
Photons
Physics
Quality assurance
Spatial resolution
Thin films
Transistors
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Summary:Quality Assurance in hadron therapy is crucial to ensure a safe and accurate dose delivery to the patients. This requires fast and reliable detectors with high spatial resolution. A first LaGEMPix prototype that combines a triple Gas Electron Multiplier and a highly pixelated readout based on a matrix of organic photodiodes coated on an oxide thin film transistor backplane has been built. The first version of the LaGEMPix has proven to have a limited spatial resolution, mainly attributed to the isotropic emission of the scintillation photons within the GEM holes. To improve the spatial resolution and confirm our predictions of the role of the photons, we built a new version of the detector with a reduced gap between the last GEM foil and the readout. Experimental results acquired using different methods and experimental set-ups show that the spatial resolution significantly improved with the new design.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2374/1/012177