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Title: Three-dimensional diamond detectors: Charge collection efficiency of graphitic electrodes

Implementation of 3D-architectures in diamond detectors promises to achieve unreached performances in the radiation-harsh environment of future high-energy physics experiments. This work reports on the collection efficiency under β-irradiation of graphitic 3D-electrodes, created by laser pulses in the domains of nanoseconds (ns-made-sensors) and femtoseconds (fs-made-sensors). Full collection is achieved with the fs-made-sensors, while a loss of 25%–30% is found for the ns-made-sensors. The peculiar behaviour of ns-made sensors has been explained by the presence of a nano-structured sp{sup 3}-carbon layer around the graphitic electrodes, evidenced by micro-Raman imaging, by means of a numerical model of the charge transport near the electrodes.
Authors:
; ;  [1] ;  [2] ; ; ;  [3] ;  [4] ;  [3]
  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)
Publication Date:
OSTI Identifier:
22253907
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 23; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 77 NANOSCIENCE AND NANOTECHNOLOGY; CHARGE COLLECTION; CHARGE TRANSPORT; DIAMONDS; EFFICIENCY; ELECTRODES; GRAPHITE; HIGH ENERGY PHYSICS; IRRADIATION; NANOSTRUCTURES; SENSORS; THREE-DIMENSIONAL CALCULATIONS