Production and characterization of large-size diamond detectors for particle tracking and medical applications

Collot, Johann; Bes, A.; Bosson, G.; Curtoni, S.; Dauvergne, D.; Gallin-Martel, L.; Gallin-Martel, M.-L.; Muraz, J.-F.; Hostachy, J.; Lacoste, A.; Marcatili, S.; Rarbi, F.; Yamouni, M.; Brom, J.-M.; Morse, J.; De-Nolf, W.; Salomé, M.; Krimmer, J.; Testa, É.

doi:10.22323/1.314.0781

Abstract

Large-size diamond detectors have been produced and tested with the aim of achieving reliable
& efficient sensors for particle tracking or medical applications. Poly- and single-crystal CVD
diamond samples were submitted to various ionizing particles. Their metallization was
performed by using Distributed MicroWave Plasmas, a process developed by LPSC. Their
detection performance was investigated using α and β radioactive sources, 95 MeV/u carbon
beams from GANIL (Caen France) and short-bunched 8.5 keV photons from ESRF. This study
is part of the ANR project MONODIAM-HE and of the CLaRyS collaboration for the on-line
dose monitoring of hadrontherapy. The goal here is to provide large-area detectors with a high
detection efficiency for carbon or proton beams, yielding time and position measurement at
count rates greater than 100 MHz. A time resolution ranging from 20 ps up to 40 ps and an
energy resolution varying from 7 % up to 10% were measured. It allowed us to conclude that
poly-crystal CVD diamond detectors are good candidates for this application.