Robust stellarator optimization via flat mirror magnetic fields

J. Velasco, I. Calvo, E. Sánchez, F. Parra

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Stellarator magnetic configurations need to be optimized in order to meet all the required properties of a fusion reactor. In this work, it is shown that a flat-mirror quasi-isodynamic (QI) configuration (i.e. a QI configuration with sufficiently small radial variation of the mirror term) can achieve small radial transport of energy and good confinement of bulk and fast ions even if it is not very close to perfect omnigeneity, and for a wide range of plasma scenarios, including low β and small radial electric field. This opens the door to constructing better stellarator reactors. On the one hand, they would be easier to design, as they would be robust against error fields. On the other hand, they would be easier to operate since, both during startup and steady-state operation, they would require less auxiliary power, and the heat loads on plasma-facing components caused by fast ion losses would be reduced to acceptable levels.

Original languageEnglish (US)
Article number126038
JournalNuclear Fusion
Issue number12
StatePublished - Dec 2023

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics


  • flat mirror
  • optimization
  • reactor
  • robust
  • stellarator


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