Orateur
Description
Advanced radiotherapy modalities require detectors capable of real-time beam monitoring, high spatial resolution and minimal beam perturbation. This work presents the development and experimental evaluation of diamond-based beam monitors for synchrotron MRT and compact X-ray platforms. A large-area single-crystal CVD diamond microstrip detector, composed of eight tiled 150 µm-thick sensors with 136 aluminium strips, was characterised at ESRF ID17 and the Australian Synchrotron IMBL using single microbeams, microbeam arrays, shaped fields and water-equivalent phantoms. Its response was assessed for strip uniformity, beam centring, field imaging and transmitted-beam attenuation, supported by GATE/GEANT4 simulations. The detector resolved individual microbeams, reproduced circular and preclinical field geometries with sub-millimetre agreement, and measured attenuation coefficients generally within ±2.5% of Monte Carlo predictions. In parallel, a pixelized diamond detector is being implemented on the Small Animal Radiation Research Platform (SARRP) to monitor millimetric beams, compare diamond response against radiochromic film, and enable real-time quality assurance for compact-source SFRT experiments. This dual approach links synchrotron validation with translational compact irradiators, supporting safer delivery, treatment verification, and dose reconstruction. Together, these developments establish diamond detectors as promising tools for online monitoring and synchronized upstream–downstream transit dosimetry in preclinical radiotherapy.
| Contribution type | Semi-conductor |
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