SMuK 2023 – wissenschaftliches Programm

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ST: Fachverband Strahlen- und Medizinphysik

ST 1: Accelerators for Radiation Therapy (joint session ST/AKBP)

ST 1.6: Vortrag

Dienstag, 21. März 2023, 12:15–12:30, GER/038

Dosimetry tests for FLASH RT at PITZ — •Felix Riemer, Zakaria Aboulbanine, Gowri Adhikari, Zohrab Amirkhanyan, Namra Aftab, Prach Boonpornprasert, Georg Georgiev, Anna Grebinyk, Andreas Hoffmann, Mikhail Krasilnikov, Xiangkun Li, Anusorn Lueangaramwong, Raffael Niemczyk, Houjun Qian, Chris Richard, Frank Stephan, Grygorii Vashchenko, Tobias Weilbach, and Steven Worm — Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738 Zeuthen, Germany

The Photo Injector Test facility at DESY in Zeuthen (PITZ) can provide unique beam parameters regarding delivered dose and dose rate. With an average dose rate of up to 107 Gy/s and peak dose rates of up to 4·1013 Gy/s, PITZ is fully capable of FLASH radiation therapy. Nevertheless, dosimetry is a major challenge. Traditional detectors cannot provide reliable measurements and linearity up to such high dose rates. A new setup is being built to create a test infrastructure for all kinds of detectors. This includes a completely new beamline exclusively for FLASH RT and biology experiments. The goal is to develop and test detectors (also from external users) which cover the whole range of dose rates available at PITZ. First dosimetry experiments using Gafchromic films were done in air and water. Dose rate linearity and a limit test of the films were done. Beam parameters like beam profile, dose depth profile in water, homogeneity and dark current were measured. First detector tests will be done using silicon sensors utilized in high energy physics experiments.

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