CVD diamond for beta particle detection in a gamma-ray background

Paul Bennett; Alireza Kargar; Leonard Cirignano; Hadong Kim; Kanai Shah

doi:10.1117/12.2323695

13 September 2018 CVD diamond for beta particle detection in a gamma-ray background

Paul Bennett, Alireza Kargar, Leonard Cirignano, Hadong Kim, Kanai Shah

Proceedings Volume 10762, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XX; 107620Z (2018) https://doi.org/10.1117/12.2323695
Event: SPIE Optical Engineering + Applications, 2018, San Diego, California, United States

Abstract

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.

Conference Presentation

Citation Download Citation

Paul Bennett, Alireza Kargar, Leonard Cirignano, Hadong Kim, and 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

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