Title :
A three-dimensional measuring method for magnetic stray fields
Author :
Matsuda, J. ; Aoyagi, K. ; Kondoh, Y. ; Iizuka, M. ; Mukasa, K.
Author_Institution :
Fac. of Eng., Nagaoka Univ. of Technol., Japan
fDate :
9/1/1990 12:00:00 AM
Abstract :
Reconstruction of three-dimensional microstray magnetic fields from a set of deflection data of electron probes deflected by the Lorentz force when passing through the object magnetic field is described. A novel reconstruction technique based on the ART (algebraic reconstruction technique) iterative method for electron beam tomography is proposed. In computer simulation, the algorithm was tested with a model example of a one-turn coil, and the achievable resolution is discussed. The algorithm was also checked experimentally with a one-turn oil and a commercial magnetic head. From these results, it is shown that the proposed method is applicable to high-intensity magnetic field reconstruction problems in electron beam tomography
Keywords :
computerised tomography; digital simulation; electrical engineering computing; iterative methods; magnetic field measurement; magnetic heads; ART iterative method; Lorentz force; algebraic reconstruction technique; commercial magnetic head; computer simulation; deflection data; electron beam tomography; electron probes; magnetic head design; one-turn coil; three-dimensional measuring method; three-dimensional microstray magnetic fields; Computer simulation; Electron beams; Iterative algorithms; Iterative methods; Lorentz covariance; Magnetic field measurement; Probes; Subspace constraints; Testing; Tomography;
Journal_Title :
Magnetics, IEEE Transactions on
