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Proceedings Paper

Identification of explosives and drugs and inspection of material defects with THz radiation
Author(s): Cunlin Zhang; Kaijun Mu; Xue Jiang; Yueying Jiao; Liangliang Zhang; Qingli Zhou; Yan Zhang; Jingling Shen; Guoshong Zhao; X.-C. Zhang
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Paper Abstract

We report the sensing of explosive materials and illicit drugs by using terahertz time-domain spectroscopy (THz-TDS) and imaging. Several explosive materials, such as γ-HNIW, RDX, 2,4-DNT, TNT, Nitro-aniline, and illicit drugs, such as methamphetamine (MA) etc were researched here. Non-destructive testing, as one of the major applications of THz imaging, can be applied to an area of critical need: the testing of aerospace materials. Composite materials such as carbon fiber are widely used in this industry. The nature of their use requires technologies that are able to differentiate between safe and unsafe materials, due to either manufacturing tolerance or damage acquired while in use. In this paper, we discuss the applicability of terahertz (THz) imaging systems to this purpose, focusing on graphite fiber composite materials, carbon silicon composite materials and so on. We applied THz imaging technology to evaluate the fire damage to a variety of carbon fiber composite samples. Major carbon fiber materials have polarization-dependent reflectivity in THz frequency range, and we show how the polarization dependence changes versus the burned damage level. Additionally, time domain information acquired through a THz time-domain spectroscopy (TDS) system provides further information with which to characterize the damage. We also detect fuel tank insulation foam panel defects with pulse and continuous-wave (CW) terahertz system.

Paper Details

Date Published: 14 January 2008
PDF: 10 pages
Proc. SPIE 6840, Terahertz Photonics, 68400S (14 January 2008); doi: 10.1117/12.760133
Show Author Affiliations
Cunlin Zhang, Capital Normal Univ. (China)
Kaijun Mu, Capital Normal Univ. (China)
Xue Jiang, Capital Normal Univ. (China)
Yueying Jiao, Capital Normal Univ. (China)
Liangliang Zhang, Capital Normal Univ. (China)
Qingli Zhou, Capital Normal Univ. (China)
Yan Zhang, Capital Normal Univ. (China)
Jingling Shen, Capital Normal Univ. (China)
Guoshong Zhao, Capital Normal Univ. (China)
X.-C. Zhang, Rensselaer Polytechnic Institute (United States)

Published in SPIE Proceedings Vol. 6840:
Terahertz Photonics
Cunlin Zhang; Xi-Cheng Zhang, Editor(s)

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