High Field/High Gradient Magnets

Coordinating university or institute

Lund University, www.lunduniversity.lu.se



Project description

The MAX IV 3 GeV electron storage ring in Lund, Sweden, represents the new generation of light sources that uses a 20-fold 7-bend achromat lattice to achieve a bare lattice emittance of 330 pm in a relatively short circumference of 528 m. The large number of strong bending magnets per achromat requires a compact magnet design that is achieved by use of small aperture (Ø 25 mm) magnets integrated into one common block i.e. each achromat has 7 magnet blocks. The project aims at demonstrating the feasibility of use small aperture (Ø 11 mm) and high field/ high gradient permanent/hybrid magnets in frame of the upgrade concept for a future diffraction-limited light sources within the constraints of the existing MAX IV 3 GeV ring tunnel.




Lund University, MAX IV Laboratory:

  • Alexey Vorozhtsov, Magnet engineer

Core deliverables

Electromagnetic & mechanical design, manufacturing and magnetic measurements of the following hybrid magnet prototypes:

  • Gradient dipole: aperture H ≥ 15 mm, yoke length ≤ 300 mm, field strength B0=(0.5-0.6) T, gradient up to 70 T/m
  • Quadrupole: aperture ø=(11/12) mm, yoke length ≤ 100 mm, gradient up to 250 T/m
  • Sextupole: aperture ø ≥ 15 mm, yoke length ≤ 150 mm, gradient B"/2 up to 20 kT/mm2
  • Magnet block containing the magnets listed above

Total budget

EUR 300,000


  • Synchrotron SOLEIL, France
  • ISA, Centre for Storage Ring Facilities, Denmark


Procurement codes

Electrical Engineering and magnets
Mechanical Engineering and raw materials

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