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Title: Radiation hardness of three-dimensional polycrystalline diamond detectors

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 ×10{sup 16 }cm{sup −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.
Authors:
;  [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [2] ;  [6] ; ;  [7] ;  [2] ;  [8] ;  [7] ;  [2] ;  [9]
  1. National Institute of Nuclear Physics (INFN), Via B. Rossi, 1-3, 50019 Sesto Fiorentino (Italy)
  2. (Italy)
  3. European Laboratory for Non-Linear Spectroscopy, Via Nello Carrara 1, 50019 Sesto Fiorentino (Italy)
  4. (INO-CNR), Largo Enrico Fermi 6, 50125 Firenze (Italy)
  5. Department of Physics and Astronomy, University of Florence, Via G. Sansone 1, 50019 Sesto Fiorentino (Italy)
  6. Jozef Stefan Institute, Jamova cesta 39, 1000 Ljubljana (Slovenia)
  7. National Institute of Nuclear Physics (INFN), Via A. Pascoli, 06123 Perugia (Italy)
  8. Department of Engineering, University of Perugia, Via G. Duranti 93, 06125 Perugia (Italy)
  9. GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt (Germany)
Publication Date:
OSTI Identifier:
22399065
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 19; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; CHARGE CARRIERS; DIAMONDS; ELECTRIC POTENTIAL; ELECTRODES; FABRICATION; MEV RANGE; NEUTRON FLUENCE; PHYSICAL RADIATION EFFECTS; POLYCRYSTALS; RADIATION DETECTORS; RADIATION HARDNESS; SENSORS; SOLIDS; SURFACES; THREE-DIMENSIONAL LATTICES