72: First investigations of Ultra-Thin 3D silicon detectors as microdosimeters

Fleta, C.; Guardiola, Consuelo; Esteban, S.; Pellegrini, G.; Quirion, D.; Rodriguez, Jean Baptiste; Gómez, F.; Carabe‐Fernandez, A; Lozano, M.

doi:10.1016/s0167-8140(15)34093-7

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“…Due to the non-tissue equivalent nature of silicon, corrections must be made for effective extraction of dose parameters [ 8 ]. Over the years, since the first publication on silicon microdosimeters, there have been continuous improvements in the design, structure and efficiency [ 9 , 10 , 11 , 12 , 13 ]. Due to the limitations of silicon-based microdosimeters, further developments in the portability and efficiency of the TEPCs are also being considered.…”

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confidence: 99%

Simultaneous Measurements of Dose and Microdosimetric Spectra in a Clinical Proton Beam Using a scCVD Diamond Membrane Microdosimeter

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et al. 2021

Sensors

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A single crystal chemical vapor deposition (scCVD) diamond membrane-based microdosimetric system was used to perform simultaneous measurements of dose profile and microdosimetric spectra with the Y1 proton passive scattering beamline of the Center of Proton Therapy, Institute Curie in Orsay, France. To qualify the performance of the set-up in clinical conditions of hadrontherapy, the dose, dose rate and energy loss pulse-height spectra in a diamond microdosimeter were recorded at multiple points along depth of a water-equivalent plastic phantom. The dose-mean lineal energy (y¯D) values were computed from experimental data and compared to silicon on insulator (SOI) microdosimeter literature results. In addition, the measured dose profile, pulse height spectra and y¯D values were benchmarked with a numerical simulation using TOPAS and Geant4 toolkits. These first clinical tests of a novel system confirm that diamond is a promising candidate for a tissue equivalent, radiation hard, high spatial resolution microdosimeter in beam quality assurance of proton therapy.

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