A simple method for computing discrete spectrum relaxations of body of revolution targets using eigenvalue decomposition

A conducting body´s Discrete Spectrum of Relaxation Frequencies (DSRF) is a valuable classifying characteristic that is used in the detection and discrimination of buried objects. In physical terms, the DSRF depicts the decay of eddy currents in a conducting body that is exposed to a time-varying magnetic field. An object´s DSRF can only be computed analytically for a few canonical cases. Numerical computations for bodies of revolution (BOR) have been presented using boundary-element and finite-element techniques, but these techniques are complex. In this work, a simpler approach based on eigenvalue decomposition is presented that is capable of computing the DSRF for a class of BORs. Approved for public release, distribution unlimited.