Scientific Results

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

Year: 2013

Authors: Lagomarsino S., Bellini M., Corsi C., Gorelli F., Parrini G., Santoro M., Sciortino S.

Autors Affiliation: National Institute of Nuclear Physics (INFN), Via B. Rossi 1-3, 50019 Sesto Fiorentino (FI), Italy; Department of Physics and Astronomy, University of Florence, Via G. Sansone 1,50019 Sesto Fiorentino (FI), Italy; European Laboratory for Non-Linear Spectroscopy, Via Nello Carrara 1, 50019 Sesto Fiorentino (FI), Italy; Istituto Nazionale di Ottica (INO-CNR), Largo Enrico Fermi 6, 50125 Firenze (FI), Italy

Abstract: 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 beta-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(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. (C) 2013 AIP Publishing LLC.

Journal/Review: APPLIED PHYSICS LETTERS

Volume: 103 (23)      Pages from: 233507  to: 233507

KeyWords: Carbon layers; Charge collection efficiency; Collection efficiency; Diamond detectors; Femtoseconds; Micro-Raman; Nano-structured; Radiation-harsh environment, Electrodes; High energy physics; Three dimensional, Sensors
DOI: 10.1063/1.4839555

Citations: 35
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