Berlin 2024 – wissenschaftliches Programm

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ST: Fachverband Strahlen- und Medizinphysik

ST 8: Accelerators for Medical Applications (joint session ST/AKBP)

ST 8.3: Vortrag

Donnerstag, 21. März 2024, 10:00–10:15, PC 203

Dosimetry based on Cherenkov radiation: a method proposed to be studied for a wide range of dose rates at FLASHlab@PITZ — •Daniel Villani, Namra Aftab, Zohrab Amirkhanyan, Prach Boonpornprasert, Dmytro Dmytriiev, Anna Grebinyk, Matthias Gross, Andreas Hoffmann, Mikhail Krasilnikov, Xiangkun Li, Frieder Mueller, Anne Oppelt, Chris Richard, Felix Riemer, Frank Stephan, Grygorii Vashchenko, and Steven Worm — Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738 Zeuthen, Germany

The Photo Injector Test facility at DESY in Zeuthen (PITZ) is preparing an R&D platform for electron FLASH radiation therapy and radiation biology (FLASHlab@PITZ). This platform is based on the unique beam parameters available at PITZ: ps scale electron bunches of up to 22 MeV with up to 5 nC bunch charge at 4.5 MHz bunch repetition rate in bunch trains of up to 1 ms in length repeating at 1 to 10 Hz. These parameters can result average dose rates within one RF pulse of up to 10⁹ Gy/s and peak dose rates up to 4×10¹³ Gy/s. At such beam conditions, dosimetry is a challenge. Studies have established that light emitted by the Cherenkov effect may be used for several radiation therapy dosimetry applications, since there is a correlation between the light captured using a UV-sensitive CCD camera and expected absorbed dose under certain conditions. This work aims to present a proposal for using Cherenkov light as a dosimetry method to be used at both low and high dose rates available at FLASHlab@PITZ.

Keywords: UHDR; Cherenkov; Dosimetry; PITZ; DESY