Performance of irradiated bulk SiC detectors

Cunningham, W., Melone, J., Horn, M., Kazukauskas, V., Roy, P., Doherty, F., Glaser, M., Vaitkus, J. and Rahman, M. (2003) Performance of irradiated bulk SiC detectors. Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 509(1-3), 127 -131. (doi:10.1016/S0168-9002(03)01560-2)

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Publisher's URL: http://dx.doi.org/10.1016/S0168-9002(03)01560-2

Abstract

Silicon carbide (SiC) is a wide bandgap material with many excellent properties for future use as a detector medium. We present here the performance of irradiated planar detector diodes made from 100-mum-thick semi-insulating SiC from Cree. Ohmic/Schottky diodes were produced and characterised using Schottky barrier measurements and charge collection efficiency (CCE) measurements were made for 5.48 MeV Am-241 alpha particles. Charge collection of similar to60% was measured initially. Measurements were taken of trap lifetimes in an effort to understand this. Three distinct traps with lifetimes of 4, 16, and 130 s were found. Irradiation took place at Paul Scherrer Institute (PSI) to fluences of 10(12), 10(13), and 5 x 10(14) cm(-2), with 300 MeV/c pions. Changes in the Schottky barrier height, leakage current, trap lifetimes, and CCE measurements give an indication of the possible degradation in performance of detectors of this type over their projected lifetime.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Melone, Mr John and Vaitkus, Prof Juozas and Doherty, Mr Frederick and Cunningham, Dr William
Authors: Cunningham, W., Melone, J., Horn, M., Kazukauskas, V., Roy, P., Doherty, F., Glaser, M., Vaitkus, J., and Rahman, M.
Subjects:Q Science > QC Physics
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
ISSN:0168-9002
ISSN (Online):1872-9576

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