Copper Sheeve Halbach Array
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1. Materials
Magnet: Neodymium Magnet
Hardware part: 10# or 20# steel, martensitic stainless steel
2. Application
Linear Halbach arrays:
Such as the brushless AC motor, voice coils, magnetic drug targeting to high-tech applications such as wiggler magnets which are used in Particle acceleratorsand Free-electron lasers.
A Halbach array produces a substantially stronger magnetic field than conventional magnet assemblies using the same amount of permanent magnet material. This is achieved through a one-sided flux effect—the magnetization vector rotates progressively across the array, reinforcing flux on the working face while suppressing it on the opposite side. The result is a concentrated, high-intensity field at the target surface with minimal stray field elsewhere, which improves magnetic circuit efficiency and simplifies shielding requirements. This combination of field intensification and directional control makes the Halbach array an ideal solution for applications demanding peak magnetic performance in a compact, focused footprint.
Halbach arrays are classified by geometry into three primary types: linear (planar), circular (cylindrical), and curved/segmented. Cylindrical arrays further divide into O.D.-focusing (field concentrated on the outer diameter) and I.D.-focusing (field concentrated on the inner diameter) sub-types. Depending on the symmetry of the desired field, cylindrical Halbach arrays are built in multipole configurations—dipolar, quadrupole, hexapole, octupole, and beyond—enabling precise magnetic field shaping for particle accelerators, electric motors, magnetic levitation, and other high-performance systems.
