Authors: A Roque S Ramos J Barão M Machado D M Sousa E Margato J Maia
Publish Date: 2012/07/15
Volume: 26, Issue: 1, Pages: 133-140
Abstract
This paper is a contribution for the assessment and comparison of magnet properties based on magnetic field characteristics particularly concerning the magnetic induction uniformity in the air gaps For this aim a solver was developed and implemented to determine the magnetic field of a magnetic core to be used in Fast Field Cycling FFC Nuclear Magnetic Resonance NMR relaxometry The electromagnetic field computation is based on a 2D finiteelement method FEM using both the scalar and the vector potential formulation Results for the magnetic field lines and the magnetic induction vector in the air gap are presented The target magnetic induction is 02 T which is a typical requirement of the FFC NMR technique which can be achieved with a magnetic core based on permanent magnets or coils In addition this application requires high magnetic induction uniformity To achieve this goal a solution including superconducting pieces is analyzed Results are compared with a different FEM program
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