27 April 2010 Millimeter wave measurements of explosives and simulants
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Abstract
Devices using electromagnetic (EM) waves in the GHz range are evolving rapidly. The advancement of this technology for security applications, such as explosives detection and personnel screening, requires an understanding of the optical properties of various materials. Using terahertz time-domain spectroscopy and free space millimeter-wave measurements, the dielectric constant of explosives have been measured. Methods used to standardize the experimental measurement and characterize the EM/material interaction are described. These results have enabled the development of mixtures of benign substances as simulants for testing. A comparison of the anticipated signal returns are presented for the range 100 - 500 GHz for a limited set of explosives and simulants.
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Jeffrey Barber, Jeffrey Barber, James C. Weatherall, James C. Weatherall, Barry T. Smith, Barry T. Smith, Steve Duffy, Steve Duffy, Stephen J. Goettler, Stephen J. Goettler, Ronald A. Krauss, Ronald A. Krauss, } "Millimeter wave measurements of explosives and simulants", Proc. SPIE 7670, Passive Millimeter-Wave Imaging Technology XIII, 76700E (27 April 2010); doi: 10.1117/12.848794; https://doi.org/10.1117/12.848794
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