Title :
A microwave-based gamma-ray detector
Author :
Cetinoneri, B. ; Atesal, Y.A. ; Kroeger, R.A. ; Tepper, G. ; Losee, J. ; Hicks, C. ; Rasmussen, Morten ; Rebeiz, Gabriel M.
Author_Institution :
University of California San Diego, La Jolla, United States
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 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 perturbation methods; Cavity resonators; Gamma ray detection; Gamma ray detectors; Microwave theory and techniques; Photoconductivity; Photonic crystals; Power measurement; Temperature sensors; Terrorism;
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.2010.5517372
