Radiation hardness of three-dimensional polycrystalline diamond detectors

Year: 2015

Authors: Lagomarsino S., Bellini M., Corsi C., Cindro V., Kanxheri K., Morozzi A., Passeri D., Servoli L., Schmidt C.J., Sciortino S.

Autors Affiliation: Natl Inst Nucl Phys INFN, I-50019 Sesto Fiorentino, FI, Italy; Univ Florence, Dept Phys & Astron, I-50019 Sesto Fiorentino, FI, Italy; European Lab Nonlinear Spect, I-50019 Sesto Fiorentino, FI, Italy; CNR, INO, I-50125 Florence, FI, Italy; Jozef Stefan Inst, Ljubljana 1000, Slovenia; Natl Inst Nucl Phys INFN, I-06123 Perugia, PG, Italy; Univ Perugia, Dept Phys, I-06123 Perugia, PG, Italy; Univ Perugia, Dept Engn, I-06125 Perugia, PG, Italy; GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany.

Abstract: The three-dimensional concept in particle detection is based on the fabrication of columnar electrodes perpendicular to the surface of a solid state radiation sensor. It permits to improve the radiation resistance characteristics of a material by lowering the necessary bias voltage and shortening the charge carrier path inside the material. If applied to a long-recognized exceptionally radiation-hard material like diamond, this concept promises to pave the way to the realization of detectors of unprecedented performances. We fabricated conventional and three-dimensional polycrystalline diamond detectors, and tested them before and after neutron damage up to 1.2 x 10(16) cm(-2), 1 MeV-equivalent neutron fluence. We found that the signal collected by the three-dimensional detectors is up to three times higher than that of the conventional planar ones, at the highest neutron damage ever experimented. (C) 2015 AIP Publishing LLC.

Journal/Review: APPLIED PHYSICS LETTERS

Volume: 106 (19)      Pages from: 193509-1  to: 193509-5

More Information: This research was funded by the European Union (HadronPhysics3 Project No. 283286), the GSI (Darmstadt) within the frame of the \”Detector technology and systems platform\” of the Helmoltz association, and the National Institute of Nuclear Physics (INFN), Italy, in the frame of the experiment 3D_SOD. We would like to thank Mirko Brianzi of INFN and Vincenzo Greco, Mauro Pucci, Andrea Sordini of INO-CNR (Florence) for their invaluable technical support in the preparation and characterization of the diamond samples.
KeyWords: Hardness; Neutrons, Neutron damage; Neutron fluences; Particle detection; Polycrystalline diamond detectors; Radiation hard; Radiation hardness; Radiation resistance; Radiation sensors, Diamonds
DOI: 10.1063/1.4921116

Citations: 36
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