Radiation Response of Perfluorinated Polymer Optical Fibers (CYTOP) to Low Doses of X-Rays, Protons, and Neutrons

Olusoji, Olugbenga Jeremiah; Penner, Crystal; Bélanger-Champagne, Camille; Strgar, Vince; Kasanda, Eva; Hoehr, Cornelia; O’Keeffe, Sinead

doi:10.1109/jsen.2023.3320874

IEEE Sensors J.

2023

DOI: 10.1109/jsen.2023.3320874

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Radiation Response of Perfluorinated Polymer Optical Fibers (CYTOP) to Low Doses of X-Rays, Protons, and Neutrons

Olugbenga Jeremiah Olusoji,

Crystal Penner,

Camille Bélanger-Champagne

et al.

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2024

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Multi-Point Sensing via Organic Optical Fibres for FLASH Proton Therapy

Penner,

Usherovich,

Andru

et al. 2024

Electronics

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Optical fibres are gaining popularity for relative dosimetry in proton therapy due to their spatial resolution and ability for near real-time acquisition. For FLASH proton therapy, these fibres need to handle higher dose rates and larger doses than for conventional proton dose rates. We developed a multi-point fibre sensor embedded in a 3D-printed phantom which can measure the profile of a FLASH proton beam. Seven PMMA fibres of 1 mm diameter were embedded in a custom 3D-printed plastic phantom of the same density as the fibres. The phantom was placed in a proton beam with FLASH dose rates at the TRIUMF Proton Therapy Research Centre (PTRC). The sensor was exposed to different proton energies, 13.5 MeV, 19 MeV and 40.4 MeV, achieved by adding PMMA bolus in front of the phantom and three different beam currents, varying the dose rates from 7.5 to 101 Gy/s. The array was able to record beam profiles in both transverse and axial directions in relative agreement with measurements from EBT-XD radiochromic films (transverse) and Monte Carlo simulations (axial). A decrease in light output over time was observed, which might be caused by radiation damage in the matrix of the fibre and characterised by an exponential decay function.

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Multi-Point Sensing via Organic Optical Fibres for FLASH Proton Therapy

Penner,

Usherovich,

Andru

et al. 2024

Electronics

View full text Add to dashboard Cite

show abstract

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Radiation Response of Perfluorinated Polymer Optical Fibers (CYTOP) to Low Doses of X-Rays, Protons, and Neutrons

Cited by 1 publication

References 42 publications

Multi-Point Sensing via Organic Optical Fibres for FLASH Proton Therapy

Multi-Point Sensing via Organic Optical Fibres for FLASH Proton Therapy

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