Title :
A microwave-based gamma-ray detector
Author :
Cetinoneri, Berke ; Atesal, Yusuf A. ; Kroeger, Richard A. ; Tepper, Gary ; Losee, Jon ; Hicks, Charles ; Rasmussen, Marc ; Rebeiz, Gabriel M.
Author_Institution :
Univ. of California, San Diego, La Jolla, CA, USA
Abstract :
This paper presents a contactless, microwave-based gamma ray detector for detecting low-energy gamma ray photons. The detection is based on a microwave cavity perturbation method, and uses a reflection-type cavity resonator with a detector-grade CZT crystal. The reflected power from the cavity is measured and this monitors the changes in the photoconductivity of the CZT crystal in the presence of a gamma-ray. A gamma ray detection sensitivity of <; 100 keV is achieved at room temperature. The proposed system can be used in homeland security or radioactive material characterization applications.
Keywords :
cavity resonators; gamma-ray detection; photoconductivity; contactless gamma ray detector; detector grade CZT crystal; gamma ray photon; microwave based gamma ray detector; microwave cavity perturbation method; photoconductivity; reflection type cavity resonator; Cavity perturbation methods; Cavity resonators; Gamma ray detection; Gamma ray detectors; Microwave theory and techniques; Photoconductivity; Photonic crystals; Power measurement; Temperature sensors; Terrorism; Cavity resonator; Q factor; gamma ray detector; microwave cavity perturbation;
Conference_Titel :
Microwave Symposium Digest (MTT), 2010 IEEE MTT-S International
Conference_Location :
Anaheim, CA
Print_ISBN :
978-1-4244-6056-4
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2010.5515945
