Variable magnet arrays to passively shim compact permanent-yoke magnets

Till Überrück; Bernhard Blümich

doi:10.1016/j.jmr.2018.11.011

Variable magnet arrays to passively shim compact permanent-yoke magnets

J Magn Reson. 2019 Jan:298:77-84. doi: 10.1016/j.jmr.2018.11.011. Epub 2018 Nov 28.

Authors

Till Überrück¹, Bernhard Blümich²

Affiliations

¹ RWTH Aachen University, Institut für Technische und Makromolekulare Chemie, Worringerweg 2, 52074 Aachen, Germany.
² RWTH Aachen University, Institut für Technische und Makromolekulare Chemie, Worringerweg 2, 52074 Aachen, Germany. Electronic address: bluemich@itmc.rwth-aachen.de.

PMID: 30529894
DOI: 10.1016/j.jmr.2018.11.011

Abstract

C-shaped permanent magnets offer a compromise between sample accessability and field strength as well as homogeneity compared to single-sided devices or Halbach arrays. A new approach to passively shim C-shaped dipole magnets is presented. It relies on the magnet poles being constructed from a set of adjustable magnet elements. Two pole concepts are introduced, which allow the correction of the field profile and passively shim the magnet without the need of additional pole shoes or shim pieces.

Keywords: Bipolar magnets; Dipole magnets; FEM Simulations/optimization; Passive shimming; Pole shoes.