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High purity, CVD grown diamond is a good candidate material for beta particle detection at elevated temperature in the
presence of a gamma ray background. Due to its wide band gap, low noise detector operation is possible at temperatures
in excess of 200 °C. Its low atomic number limits its gamma-ray interaction probability. Stacked diamond detectors
operated in coincidence can further reduce background due to gamma-ray interactions. In addition, high charge carrier
mobility and high breakdown voltage enable high count rate operation. In this paper we report on gamma-ray and beta
particle detection of CVD diamond detectors with thickness ranging from ~ 0.1 mm to 0.5 mm. CVD grown diamond
materials were acquired from Element Six. Planar devices were fabricated by depositing Au/Cr contacts by thermal
evaporation. Measurements of single diamond detectors and stacked detectors operated in coincidence as well as
measurements at elevated temperatures are presented in this paper.
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Paul Bennett, Alireza Kargar, Leonard Cirignano, Hadong Kim, Kanai Shah, "CVD diamond for beta particle detection in a gamma-ray background," Proc. SPIE 10762, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XX, 107620Z (13 September 2018); https://doi.org/10.1117/12.2323695