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19 May 2006 Fire damage on carbon fiber materials characterized by THz waves
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We apply THz imaging technology to evaluate fire damage to a variety of carbon fiber composite samples. The majority of carbon fiber materials have polarization-dependent reflectivities in the THz frequency range, and we show how the polarization dependence changes versus the burn damage level. Additionally, time domain information acquired through a THz time-domain spectroscopy (TDS) system provides further information with which to characterize the damage. The technology is discussed in terms of nondestructive testing applications to the defense and aerospace industries.
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Nicholas Karpowicz, David Dawes, Mark J. Perry, and X.-C. Zhang "Fire damage on carbon fiber materials characterized by THz waves", Proc. SPIE 6212, Terahertz for Military and Security Applications IV, 62120G (19 May 2006);

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