Practical Concepts for Design, Construction and Application of Halbach Magnets in Magnetic Resonance

TL;DR

This paper reviews practical design principles and strategies for constructing Halbach magnets used in magnetic resonance, including field estimation, homogenization, and temperature compensation techniques.

Contribution

It provides comprehensive practical guidelines and analytical tools for designing and building Halbach magnets tailored for magnetic resonance applications.

Findings

Analytical equations for magnetic field estimation from ideal to realistic systems.

Strategies for magnetic field homogenization and opening magnets without force.

Review of temperature compensation and practical construction considerations.

Abstract

This review is a compilation of relevant concepts in designing Halbach multipoles for magnetic resonance applications. The main focus is on providing practical guidelines to plan, design and build such magnets. Therefore, analytical equations are presented for estimating the magnetic field from ideal to realistic systems. Various strategies of homogenizing magnetic fields are discussed together with concepts of opening such magnets without force, or combining them for variable fields. Temperature compensation and other practical aspects are also reviewed. For magnetic resonance two polarities (di- and quadrupole) are of main interest, but higher polarities are also included.