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Article
Title Real-time Plastic Scintillation Dosimetry of Ultra-High Dose Rate Very High Energy Electrons (VHEE) at CERN CLEAR Facility
Author(s) Giguère, Cloé (Laval U.) ; Hart, Alexander (Victoria U.) ; Bateman, Joseph (Oxford U.) ; Korysko, Pierre (Oxford U. ; CERN) ; Farabolini, Wilfrid (CERN) ; LeChasseur, Yoan (McGill U.) ; Bazalova-Carter, Magdalena (Victoria U.) ; Beaulieu, Luc (Laval U.)
Publication 2024
Number of pages 4
In: J. Phys. : Conf. Ser. 2799 (2024) 012016
In: 13th International Conference on 3D dosimetry (IC3DDose 2024), Aarhus, Denmark, 17 - 19 Jun 2024, pp.012016
DOI 10.1088/1742-6596/2799/1/012016
Subject category Detectors and Experimental Techniques
Accelerator/Facility, Experiment CLEAR
Abstract Very High Energy Electrons (VHEE) that can theoretically treat deep-seated tumours and be delivered at ultra-high dose rates (UHDR) could be the solution to translate FLASH radiotherapy into the clinic. Standard dosimeters have limited application in those extreme conditions, but dose-rate independent and fast-response plastic scintillation detectors (PSDs) are a potential alternative to overcome this. In this work, response of a 4-channel PSD to the 200 MeV VHEE UHDR beam delivered with doses and dose rates in pulse up to 90 Gy and 4.6 × 10$^{9}$ Gy/s, respectively, at the CLEAR facility in CERN was characterized, using the Hyperscint RP200 platform. Scintillation light linearity with dose was observed for three scintillators from ∼5-50 Gy, while clear eiber output was linear up to 90 Gy. While linearity on this dose range was conserved even after radiation damage by exposure to 37.2 kGy total accumulated dose, light output signieicantly decreased. This work proves the potential of plastic scintillators for real-time dosimetry of UHDR VHEE beams.
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