Original Research

Journal of Fusion Energy

, Volume 30, Issue 2, pp 144-156

First online:

Open Access This content is freely available online to anyone, anywhere at any time.

Field and Coil Design for a Quadrupolar Mirror Hybrid Reactor

  • A. HagnestålAffiliated withÅngström Laboratory, Division of Electricity, Uppsala University Email author 
  • , O. ÅgrenAffiliated withÅngström Laboratory, Division of Electricity, Uppsala University
  • , V. E. MoiseenkoAffiliated withInstitute of Plasma Physics, National Science Center “Kharkov Institute of Physics and Technology”


A vacuum magnetic field from a superconducting coil set for a single cell minimum B fusion-fission mirror machine reactor is computed. The magnetic field is first optimized for MHD flute stability, ellipticity and field smoothness in a long-thin approximation. Recirculation regions and magnetic expanders are added to the mirror machine without an optimizing procedure. The optimized field is thereafter reproduced by a set of circular and quadrupolar coils. The coils are modelled using filamentary line current distributions. Basic scaling assumptions are implemented for the coil design, with a maximum allowed current density of 1.5 kA/cm2. The coils are optimized using a local optimization method and the resulting field is checked for MHD flute stability and maximum ellipticity.


Fusion-fission reactor Hybrid reactor Magnetic coils Mirror machine