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FEA results for y-directional magnetic flux density along the horizontal line (xx’) including active coils for slow-axis scan (0.45 mm above the surface of the magnet, 1.5 mm away from the rotational axis for slow-axis scan). (a) Active coil on the boundary between magnet poles (eight magnets); (b) active coil on the surface of magnets (four magnets); (c) comparison of y-directional magnetic flux density at the active current path depending on the type of magnetic assembly.
