SMuK 2023 – wissenschaftliches Programm

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ST: Fachverband Strahlen- und Medizinphysik

ST 5: Physics and Technology for Radiation Detection

ST 5.5: Vortrag

Mittwoch, 22. März 2023, 16:50–17:05, ZEU/0146

Fast neutron detection in proton beam therapy using SciFi detectors — •Martin Lau, Justus Beckmann, Kevin Kröninger, Alina Johanna Landmann, Jennifer Schlüß, and Jens Weingarten — TU Dortmund University, Department of Physics, Germany

Proton beam therapy is a rapidly growing field, due to the precise dose distribution within the patient. There are however many uncertainties regarding the range of proton beams. A simulation study showed, that the proton beam depth in a water phantom could be reconstructed by tracking the fast neutron trajectories emitted along the beam during irradiation. Fast neutrons undergo less scattering in material. This leads to a more precise reconstruction of their trajectories. Due to the difficulty of fast neutron detection, the potential use of SciFi detectors from the LHCb upgrade are investigated to track fast neutrons in a clinical environment due to their high spatial resolution. To determine the applicability of scintillating fibres for fast neutron detection in a clinical setting, the neutron detection capabilities and the resulting light yields of these fibres are investigated through GEANT4 simulations. Parallel, we will be testing the actual SciFi detector matt for practical uses during irradiation.

This talk will present the first results of the simulations, necessary for the reconstruction of the beam. Additionally, first studies of the actual SciFi detector system were performed, which will also be presented.