<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Frederico B. Costa</style></author><author><style face="normal" font="default" size="100%">Miguel A. Machado</style></author><author><style face="normal" font="default" size="100%">Grégoire J. Bonfait</style></author><author><style face="normal" font="default" size="100%">Vieira, Pedro</style></author><author><style face="normal" font="default" size="100%">Telmo G. Santos</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Continuous wave terahertz imaging for NDT: Fundamentals and experimental validation</style></title><secondary-title><style face="normal" font="default" size="100%">Measurement</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2021</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://doi.org/10.1016/j.measurement.2020.108904</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">172</style></volume><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Continuous wave terahertz (CW THz) imaging, is a variant of terahertz imaging that has been gaining scientific&lt;br /&gt;
and technological relevance in multiple areas. In this paper the fundamental phenomena of CW THz were&lt;br /&gt;
studied and a mathematical model was developed that successfully describes the Fabry–Perot interference for&lt;br /&gt;
such a system, opening the possibility for measurement of thicknesses and surface curvatures. The capabilities&lt;br /&gt;
of the system were tested using different types of defects, such as voids, water infiltrations and thin metallic&lt;br /&gt;
wires. The interactions between different materials, features and the radiation beam were numerically studied&lt;br /&gt;
using finite element method and the results agreed with the experiments. By comparing the results with other&lt;br /&gt;
Non-Destructive Testing methods, it was found that CW THz imaging is particularly interesting to image water&lt;br /&gt;
infiltrations and composite materials that incorporate conductive wires.&lt;/p&gt;
</style></abstract><issue><style face="normal" font="default" size="100%">108904</style></issue></record></records></xml>