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DTSTART;TZID=Europe/Stockholm:20260701T090000
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UID:submissions.pasc-conference.org_PASC26_sess150@linklings.com
SUMMARY:MS4B - Computational Methods in Optimization and Modeling of Stell
 arators
DESCRIPTION:Access the recording\n\nOrganizer(s): Florian Hindenlang, Eric
  Sonnendrücker (Max Planck Institute for Plasma Physics), and Stephan Brun
 ner (EPFL),\n\nThis minisymposium highlights cutting-edge computational ad
 vances in stellarator design. Unlike tokamaks, stellarators achieve plasma
  confinement through complex 3D magnetic fields, enabling steady-state ope
 ration without plasma current. However, their design involves navigating a
  vast configuration space, requiring high-fidelity physics models and effi
 cient optimization algorithms. This session presents recent breakthroughs 
 in simulation and optimization tools essential for modern stellarator deve
 lopment. Erol Balkovic introduces SPECTRE, a fast solver for general MHD e
 quilibria with arbitrary magnetic topology, including islands and chaos. R
 obert Köberl discusses the ideal MHD free-boundary equilibrium problem and
  the GVEC code. Dario Panici presents DESC, a next-generation optimization
  framework leveraging JAX for automatic differentiation and GPU accelerati
 on. Finally, Robert Davies showcases rapid computational tools for charact
 erizing magnetic topology at the edge, which is critical for divertor desi
 gn, and their integration into optimization workflows. Together, these tal
 ks underpin the need for advanced algorithms in advancing stellarator phys
 ics and design.\n\nSPECTRE: A Fast and Robust Solver for MHD Equilibria wi
 th Arbitrary Magnetic Topology\n\nWe present the development of a new equi
 librium code, SPECTRE, which robustly solves the MRxMHD equations which de
 scribe partially-relaxed steady-state plasma configurations with arbitrary
  topology. SPECTRE divides a plasma domain into subvolumes, solves for lin
 ear Beltrami field within each of thes...\n\n\nErol Balkovic, Joaquim Loiz
 u, and Chris Smiet (EPFL)\n---------------------\nTheoretical and Computat
 ional Aspects of the Ideal MHD Equilibrium Free-Boundary Problem\n\nIn the
  ideal MHD equilibrium free-boundary problem, a plasma equilibrium is foun
 d which is consistent with a given background magnetic field. This backgro
 und magnetic field replaces the fixed last closed flux surface, which is t
 ypically used in fixed-boundary equilibria, as a constraint. Free-bounda..
 .\n\n\nRobert Köberl, Dean Muir, Florian Hindenlang, Omar Maj, and Robert 
 Babin (Max Planck Institute for Plasma Physics)\n---------------------\nDE
 SC: An Efficient and Approachable Tool for Stellarator Optimization and De
 sign\n\nThis talk will cover the design choices underpinning DESC and how 
 they were informed by the needs of stellarator optimization, performance, 
 and user-friendliness, including the numerical methods and bases used, as 
 well as the use of JAX for automatic differentiation and GPU utilization. 
 Some recent ...\n\n\nDario Panici (Princeton University); Rory Conlin (Ins
 titute for Research in Electronics and Applied Physics, University of Mary
 land); Daniel Dudt (Thea Energy); Yigit Gunsur Elmacioglu and Lee Kadz (Pr
 inceton University); and Egemen Kolemen (Princeton University, Princeton P
 lasma Physics Lab)\n---------------------\nUnderstanding and Optimising Ma
 gnetic Topology in the Stellarator Edge\n\nMagnetic confinement fusion rel
 ies on confining a plasma (consisting of hydrogen ions and electrons) usin
 g carefully-designed magnetic fields, and heating to fusion-relevant tempe
 ratures. In steady state, a reactor would be constantly producing heat and
  helium “ash”, which steadily leaks...\n\n\nRobert Davies (Max Planck Inst
 itute for Plasma Physics)\n\nDomain: Physics, Computational Methods and Ap
 plied Mathematics\n\nSession Chair: Florian Hindenlang (Max Planck Institu
 te for Plasma Physics)
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