MAGNET ASSEMBLY WITH IMPROVED FIELD UNIFORMITY AND METHODS OF MAKING AND USING SAME
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United States of America Patent
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Apr 18, 2019
app pub date -
Nov 30, 2018
filing date -
Oct 2, 2017
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Abstract
An opposed dipole magnet assembly is provided that exhibits higher magnetic field uniformity than traditional magnet assemblies, such as H-shaped magnet assemblies. The opposed dipole magnet assembly includes two permanent magnets that are spaced apart and oriented such that their respective magnetization directions are parallel. Plates formed of a high permeability material are attached to top and bottom surfaces of the two permanent magnets so as to form a hollow field region. With this geometry, the magnetic field in the hollow field region is in a direction antiparallel to the magnetic field directions of the two permanent magnets.
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