Practical HTS SQUID Magnetometer System for NDI of Aircraft

摘要

This report describes a study to assess the feasibility of using a high-Tc SQUIDbased magnetometry system to detect subsurface defects in aircraft. Four major tasks were performed: (1) identification of the defects of most interest to the aircraft NDI community; (2) mathematical modelling of the magnetic field due to a defect when exposed to eddy currents; (3) experimental demonstration of the technique on scale models using a laboratory system; and (4) detailed analysis of the electronic and cryogenic system requirements. This work was performed in collaboration with Dr. Fred Wellstood of the Superconductivity Center at the University of Maryland. NDI, High-Tc SQUID, Eddy currents, Magnetic imaging, Aircraft inspection.