Al2O3:C optically stimulated luminescence dosimeters (OSLDs) for ultra-high dose rate proton dosimetry
| Autor: | Eduardo G. Yukihara, Serena Psoroulas, Konrad Pawel Nesteruk, Sairos Safai, David Meer, Michele Togno, T. Lomax, Jeppe Brage Christensen, Damien C. Weber |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Dosimeter Radiological and Ultrasound Technology Proton Optically stimulated luminescence business.industry 610 Medicine & health 030218 nuclear medicine & medical imaging 3. Good health Pencil (optics) 03 medical and health sciences 0302 clinical medicine Optics 030220 oncology & carcinogenesis Dosimetry Radiology Nuclear Medicine and imaging Irradiation Dose rate business Beam (structure) ultra-high dose rate [FLASH proton dosimetry optically stimulated luminescence Al2O3] |
| Zdroj: | Christensen, Jeppe Brage; Togno, Michele; Nesteruk, Konrad Pawel; Psoroulas, Serena; Meer, David; Weber, Damien Charles; Lomax, Tony; Yukihara, Eduardo G; Safai, Sairos (2021). Al2O3:C optically stimulated luminescence dosimeters (OSLDs) for ultra-high dose rate proton dosimetry. Physics in medicine and biology, 66(8) Institute of Physics Publishing IOP 10.1088/1361-6560/abe554 Physics in Medicine and Biology, 66 (8) |
| DOI: | 10.1088/1361-6560/abe554 |
| Popis: | The response of Al2O3:C optically stimulated luminescence detectors (OSLDs) was investigated in a 250 MeV pencil proton beam. The OSLD response was mapped for a wide range of average dose rates up to 9000 Gy s−1, corresponding to a ∼150 kGy s−1 instantaneous dose rate in each pulse. Two setups for ultra-high dose rate (FLASH) experiments are presented, which enable OSLDs or biological samples to be irradiated in either water-filled vials or cylinders. The OSLDs were found to be dose rate independent for all dose rates, with an average deviation −1 when irradiated in the two setups. A third setup for irradiations in a 9000 Gy s−1 pencil beam is presented, where OSLDs are distributed in a 3 × 4 grid. Calculations of the signal averaging of the beam over the OSLDs were in agreement with the measured response at 9000 Gy s−1. Furthermore, a new method was presented to extract the beam spot size of narrow pencil beams, which is in agreement within a standard deviation with results derived from radiochromic films. The Al2O3:C OSLDs were found applicable to support radiobiological experiments in proton beams at ultra-high dose rates. |
| Databáze: | OpenAIRE |
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