Numerical modeling of magnetic moments for UXO applications

Vinicio Sanchez; Yaoguo Li; Misac Nabighian; David Wright

doi:10.1117/12.664959

4 May 2006 Numerical modeling of magnetic moments for UXO applications

Vinicio Sanchez, Yaoguo Li, Misac Nabighian, David Wright

Proceedings Volume 6239, Targets and Backgrounds XII: Characterization and Representation; 623907 (2006) https://doi.org/10.1117/12.664959
Event: Defense and Security Symposium, 2006, Orlando (Kissimmee), Florida, United States

Abstract

The surface magnetic anomaly observed in UXO clearance is mainly dipolar and, consequently, the dipole is the only magnetic moment regularly recovered in UXO applications. The dipole moment contains information about intensity of magnetization but lacks information about shape. In contrast, higher-order moments, such as quadrupole and octupole, encode asymmetry properties of the magnetization distribution within the buried targets. In order to improve our understanding of magnetization distribution within UXO and non-UXO objects and its potential utility in UXO clearance, we present a 3D numerical modeling study for highly susceptible metallic objects. The basis for the modeling is the solution of a nonlinear integral equation describing magnetization within isolated objects. A solution for magnetization distribution then allows us to compute magnetic moments of the object, analyze their relationships, and provide a depiction of the surface anomaly produced by different moments within the object. Our modeling results show significant high-order moments for more asymmetric objects situated at depths typical of UXO burial, and suggest that the increased relative contribution to magnetic gradient data from these higher-order moments may provide a practical tool for improved UXO discrimination.

Citation Download Citation

Vinicio Sanchez, Yaoguo Li, Misac Nabighian, and David Wright "Numerical modeling of magnetic moments for UXO applications", Proc. SPIE 6239, Targets and Backgrounds XII: Characterization and Representation, 623907 (4 May 2006); https://doi.org/10.1117/12.664959

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available