Berlin 2024 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 11: Accelerators for Medical Applications (joint session ST/AKBP)
AKBP 11.2: Vortrag
Donnerstag, 21. März 2024, 09:45–10:00, PC 203
Dosimetry at low and ultra-high dose rates at FLASHlab@PITZ — •Felix Riemer, Namra Aftab, Zohrab Amirkhanyan, Prach Boonpornprasert, Dmytro Dmytriiev, Anna Grebinyk, Matthias Gross, Andreas Hoffmann, Mikhail Krasilnikov, Xiangkun Li, Frieder Mueller, Anne Oppelt, Chris Richard, Frank Stephan, Grygorii Vashchenko, Daniel Villani, and Steven Worm — Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738 Zeuthen, Germany
A new R&D facility for radiation therapy studies, called FLASHlab@PITZ, is being setup at the Photo Injector Test facility at DESY in Zeuthen (PITZ). It can provide worldwide unique beam parameters regarding delivered dose and dose rate. With an average dose rate within one RF pulse of up to 109 Gy/s and peak dose rates up to 4×1013 Gy/s, PITZ is fully capable of ultra-high dose rate experiments, for example the investigation of the FLASH effect. Nevertheless, dosimetry is a major challenge. Traditional detectors suffer from saturation and cannot provide reliable measurements up to such high dose rates. The goal is to test and benchmark detectors (also from external users) that cover the whole range of dose rates available at PITZ. Results of experiments using Gafchromic films in air and water will be presented. Dose depth profiles for four completely different beam configurations were measured with films and compared to Monte-Carlo simulations using FLUKA. The commercially available ionization chamber PPC05 (IBA Dosimetry) was benchmarked and comparisons with film measurements will be shown.
Keywords: UHDR; Gafchromic films; Ionization chamber; PITZ; DESY