scCVD diamond membrane based microdosimeter for hadron therapy

Izabella Zahradnik (1) , Philippe Barberet (2) , Philippe Bergonzo (1) , Ludovic de Marzi (3) , Wataru Kada (4) , Stukan Natko (5) , Michal Pomorski (1) , Samuel Saada (1) , Dominique Tromson (1)

1 LCD (CEA, LIST) - Laboratoire Capteurs Diamant (CEA, LIST)
2 CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan
3 Institut Curie [Paris]
4 Gunma University
5 IRB - Institut Ruđer Bošković

Hadron therapy is an innovative mode of radiation therapy for cancer treatment which enables tumour cells to be more effectively destroyed than conventional radiation therapy using photons. Based on single-crystal CVD, super-thin diamond membranes obtained using deep Ar/O plasma etching, a prototype of a solid-state microdosimeter for Linear Energy Transfer measurements was produced at the Diamond Sensors Laboratory of CEA-LIST. The response of the diamond membrane microdosimeter to single projectiles was investigated in ion micro-beams. This novel microdosimeter was tested in a 100 MeV therapeutic proton beam at Institut Curie and the experimental data compared to Monte Carlo simulation.

Keywords: diamond; hadron therapy; ionizing radiation; cancer; instrumentation; nuclear instrumentation; dosimetry; dosimeter; protons; tumour; biological efficiency; thin film; Chemical Vapor Deposition (CVD); plasma etching; Monte Carlo; simulation

Domains: Medical Physics [physics.med-ph]; Instrumentation and Detectors [physics.ins-det]

Izabella Zahradnik, Philippe Barberet, Philippe Bergonzo, Ludovic de Marzi, Wataru Kada, et al.. scCVD diamond membrane based microdosimeter for hadron therapy. Hasselt Diamond Workshop 2018 - SBDD XXIII, Mar 2018, Hasselt, Belgium. pp.184. ⟨cea-04174606⟩