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DTSTAMP:20260421T090513Z
LOCATION:Bldg. 6 - Room 003
DTSTART;TZID=Europe/Stockholm:20260701T090000
DTEND;TZID=Europe/Stockholm:20260701T110000
UID:submissions.pasc-conference.org_PASC26_sess150@linklings.com
SUMMARY:MS4B - Computational Methods in Optimization and Modeling of Stell
 arators
DESCRIPTION:This minisymposium highlights cutting-edge computational advan
 ces in stellarator design. Unlike tokamaks, stellarators achieve plasma co
 nfinement through complex 3D magnetic fields, enabling steady-state operat
 ion without plasma current. However, their design involves navigating a va
 st configuration space, requiring high-fidelity physics models and efficie
 nt optimization algorithms. This session presents recent breakthroughs in 
 simulation and optimization tools essential for modern stellarator develop
 ment. Erol Balkovic introduces SPECTRE, a fast solver for general MHD equi
 libria with arbitrary magnetic topology, including islands and chaos. Robe
 rt Köberl discusses the ideal MHD free-boundary equilibrium problem and th
 e GVEC code. Dario Panici presents DESC, a next-generation optimization fr
 amework leveraging JAX for automatic differentiation and GPU acceleration.
  Finally, Robert Davies showcases rapid computational tools for characteri
 zing magnetic topology at the edge, which is critical for divertor design,
  and their integration into optimization workflows. Together, these talks 
 underpin the need for advanced algorithms in advancing stellarator physics
  and design.\n\nTheoretical and computational aspects of the ideal MHD equ
 ilibrium free-boundary problem\n\nIn the ideal MHD equilibrium free-bounda
 ry problem, a plasma equilibrium is found which is consistent with a given
  background magnetic field. This background magnetic field replaces the fi
 xed last closed flux surface, which is typically used in fixed-boundary eq
 uilibria, as a constraint. Free-bounda...\n\n\nRobert Köberl, Dean Muir, F
 lorian Hindenlang, Omar Maj, and Robert Babin (Max Planck Institute for Pl
 asma Physics)\n---------------------\nDESC: an Efficient and Approachable 
 Tool for Stellarator Optimization and Design\n\nThis talk will cover the d
 esign choices underpinning DESC and how they were informed by the needs of
  stellarator optimization, performance, and user-friendliness, including t
 he numerical methods and bases used, as well as the use of JAX for automat
 ic differentiation and GPU utilization. Some recent ...\n\n\nDario Panici 
 (Princeton University); Rory Conlin (Institute for Research in Electronics
  and Applied Physics, University of Maryland); Daniel Dudt (Thea Energy); 
 Yigit Gunsur Elmacioglu and Lee Kadz (Princeton University); and Egemen Ko
 lemen (Princeton University, Princeton Plasma Physics Lab)\n--------------
 -------\nUnderstanding and optimising magnetic topology in the stellarator
  edge\n\nMagnetic confinement fusion relies on confining a plasma (consist
 ing of hydrogen ions and electrons) using carefully-designed magnetic fiel
 ds, and heating to fusion-relevant temperatures. In steady state, a reacto
 r would be constantly producing heat and helium “ash”, which steadily leak
 s...\n\n\nRobert Davies (Max Planck Institute for Plasma Physics)\n-------
 --------------\nSPECTRE: a fast and robust solver for MHD equilibria with 
 arbitrary magnetic topology\n\nWe present the development of a new equilib
 rium code, SPECTRE, which robustly solves the MRxMHD equations which descr
 ibe partially-relaxed steady-state plasma configurations with arbitrary to
 pology. SPECTRE divides a plasma domain into subvolumes, solves for linear
  Beltrami field within each of thes...\n\n\nErol Balkovic, Joaquim Loizu, 
 and Chris Smiet (EPFL)\n\nDomain: Physics, Computational Methods and Appli
 ed Mathematics\n\nSession 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)
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