Regensburg 2025 – scientific programme
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MA: Fachverband Magnetismus
MA 38: Magnetic Particles / Clusters & Biomagnetism
MA 38.6: Talk
Thursday, March 20, 2025, 16:30–16:45, H18
Arranging dipoles on a ring to create homogenous fields — •Ingo Rehberg1 and Peter Blümler2 — 1Experimental Physics, University of Bayreuth, D-95440 Bayreuth, Germany — 2Institute of Physics, University of Mainz, 55128 Mainz, Germany
Homogeneous magnetic fields can be generated using appropriately arranged permanent magnets. Halbach rings serve as a prominent example of this approach [1], particularly effective when employing very long magnetic rods, often modelled as line dipoles. However, for shorter magnets, the optimal configuration of magnetic moments diverges from the traditional Halbach geometry [2]. In this talk, we present an experimental setup utilizing magnetic cubes and visualize the anticipated fields through an open-source animation of point dipole clusters [3].
[1] Peter Blümler and Helmut Soltner, Practical Concepts for Design, Construction and Application of Halbach Magnets in Magnetic Resonance. Appl. Magn. Reson. 54, 1701 (2023).
[2] Ingo Rehberg and Peter Blümler, submitted.
[3] Ingo Rehberg, From Concentric Halbach Rings to Tetraplex Cuts - Examine 540 Dipole Clusters with a Single Python Animation. https://zenodo.org/records/11214206 (2024).
Keywords: Dipole clusters; Halbach rings; homogeneous fields; Python animation; magnetic cubes