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首页> 外文会议>Conference on Terahertz Photonics; 20071112-14; Beijing(CN) >Identification of Explosives and Drugs Inspection of Material Defects with THz Radiation
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Identification of Explosives and Drugs Inspection of Material Defects with THz Radiation

机译：炸药和毒品的识别以及THz辐射的重大缺陷检查

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摘要

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.
机译：我们报告通过使用太赫兹时域光谱（THz-TDS）和成像对爆炸性材料和非法药物进行感测。在此研究了几种爆炸性材料，例如γ-HNIW，RDX，2,4-DNT，TNT，硝基苯胺和非法药物，例如甲基苯丙胺（MA）等。作为THz成像的主要应用之一，无损检测可以应用于至关重要的领域：航空航天材料的检测。碳纤维等复合材料已广泛应用于该行业。由于制造公差或使用过程中产生的损坏，使用它们的性质需要能够区分安全材料和不安全材料的技术。在本文中，我们讨论了太赫兹（THz）成像系统为此目的的适用性，重点是石墨纤维复合材料，碳硅复合材料等。我们应用了太赫兹成像技术来评估各种碳纤维复合材料样品的火灾损失。主要的碳纤维材料在太赫兹频率范围内具有偏振相关的反射率，我们展示了偏振相关性如何随燃烧损坏程度而变化。此外，通过THz时域光谱（TDS）系统获取的时域信息还提供了表征损坏的更多信息。我们还使用脉冲和连续波（CW）太赫兹系统检测燃油箱绝缘泡沫板的缺陷。

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