DONALD: A 2.5 T wide sample space permanent magnet

Jason Potticary, Michael P. Avery, Doug Mills, Simon R. Hall*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

1 Citation (Scopus)
288 Downloads (Pure)


The permanent magnet apparatus described herein is based upon the C-shaped permanent magnet. It is designed to maximise field strength while increasing the pole gap to 5 mm, providing a sample volume large enough for wide applicability. The production of this equipment aims to provide a homogeneous, high field (∼2.5 T) magnetic sample environment with a volume large enough to accommodate solution crystallisation experiments in sample chambers such as NMR tubes and cuvettes whilst simultaneously allowing direct observation of the sample from a wide angle. Although the resulting rig is not lightweight at 26.5 kg it is eminently more portable than an equivalent electromagnet system (of the order of 625 kg), and provides a max field strength of 2.468 T with relatively low stray field.
Original languageEnglish
Pages (from-to)39-48
Number of pages10
Early online date10 Jan 2018
Publication statusPublished - Apr 2018


  • Horse-shoe magnet
  • Permanent magnet
  • Sample environment

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