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DTSTAMP:20260421T090513Z
LOCATION:Bldg. 6 - Room 003
DTSTART;TZID=Europe/Stockholm:20260701T090000
DTEND;TZID=Europe/Stockholm:20260701T093000
UID:submissions.pasc-conference.org_PASC26_sess150_msa103@linklings.com
SUMMARY:SPECTRE: a fast and robust solver for MHD equilibria with arbitrar
 y magnetic topology
DESCRIPTION:Erol Balkovic, Joaquim Loizu, and Chris Smiet (EPFL)\n\nWe pre
 sent the development of a new equilibrium code, SPECTRE, which robustly so
 lves the MRxMHD equations which describe partially-relaxed steady-state pl
 asma configurations with arbitrary topology. SPECTRE divides a plasma doma
 in into subvolumes, solves for linear Beltrami field within each of these,
  and employs least squares trust-region-based minimization to find geometr
 y where the pressure is balanced across each interface dividing the subvol
 umes.  We demonstrate the benefits of our approach through several example
 s, including  axisymmetric equilbria and 3D plasma configurations of optim
 ized stellarators. These cases show that we can calculate general 3D equil
 ibria where the topology of the field is not predetermined and can contain
  nested magnetic flux surfaces, magnetic islands, and chaos.  Furthermore,
  we show that the equilibria are robust to perturbations of the starting c
 onfiguration and that the configurations achieve good numerical convergenc
 e.\n\nDomain: Physics, Computational Methods and Applied Mathematics\n\nSe
 ssion Chairs: Florian Hindenlang (Max Planck Institute for Plasma Physics)
 ; Stephan Brunner (EPFL); and Eric Sonnendrücker (Max Planck Institute for
  Plasma Physics, Technical University of Munich)\n\n
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