Accession Number:

ADA446719

Title:

Electromagnetic Crack Detection Inverse Problems Using Terahertz Interrogating Signals

Descriptive Note:

Corporate Author:

NORTH CAROLINA STATE UNIV AT RALEIGH CENTER FOR RESEARCH IN SCIENTIFIC COMPUTATION

Report Date:

2003-10-01

Pagination or Media Count:

60.0

Abstract:

We apply an inverse problem formulation to determine characteristics of a defect from a perturbed electromagnetic interrogating signal. A defect crack inside of a dielectric material causes a disruption, from reflections and refractions off of the interfaces, of the windowed interrogating signal. We model the electromagnetic waves inside the material with Maxwells equations. Using simulations as forward solves, our Newton-based, iterative optimization scheme resolves the dimensions and location of the defect. Numerical results are given in tables and plots, standard errors are calculated, and computational issues are addressed.

Subject Categories:

  • Numerical Mathematics
  • Statistics and Probability
  • Electromagnetic Pulses
  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE