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DTSTAMP:20260605T154543Z
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:Organizer(s): Florian Hindenlang, Eric Sonnendrücker (Max Plan
 ck Institute for Plasma Physics), and Stephan Brunner (EPFL),\n\nThis mini
 symposium highlights cutting-edge computational advances in stellarator de
 sign. Unlike tokamaks, stellarators achieve plasma confinement through com
 plex 3D magnetic fields, enabling steady-state operation without plasma cu
 rrent. However, their design involves navigating a vast configuration spac
 e, requiring high-fidelity physics models and efficient optimization algor
 ithms. This session presents recent breakthroughs in simulation and optimi
 zation tools essential for modern stellarator development. Erol Balkovic i
 ntroduces SPECTRE, a fast solver for general MHD equilibria with arbitrary
  magnetic topology, including islands and chaos. Robert Köberl discusses t
 he ideal MHD free-boundary equilibrium problem and the GVEC code. Dario Pa
 nici presents DESC, a next-generation optimization framework leveraging JA
 X for automatic differentiation and GPU acceleration. Finally, Robert Davi
 es showcases rapid computational tools for characterizing magnetic topolog
 y at the edge, which is critical for divertor design, and their integratio
 n into optimization workflows. Together, these talks underpin the need for
  advanced algorithms in advancing stellarator physics and design.\n\nDESC:
  An Efficient and Approachable Tool for Stellarator Optimization and Desig
 n\n\nThis talk will cover the design choices underpinning DESC and how the
 y were informed by the needs of stellarator optimization, performance, and
  user-friendliness, including the numerical methods and bases used, as wel
 l as the use of JAX for automatic differentiation and GPU utilization. Som
 e recent ...\n\n\nDario Panici (Princeton University); Rory Conlin (Instit
 ute for Research in Electronics and Applied Physics, University of Marylan
 d); Daniel Dudt (Thea Energy); Yigit Gunsur Elmacioglu and Lee Kadz (Princ
 eton University); and Egemen Kolemen (Princeton University, Princeton Plas
 ma Physics Lab)\n---------------------\nUnderstanding and Optimising Magne
 tic Topology in the Stellarator Edge\n\nMagnetic confinement fusion relies
  on confining a plasma (consisting of hydrogen ions and electrons) using c
 arefully-designed magnetic fields, and heating to fusion-relevant temperat
 ures. In steady state, a reactor would be constantly producing heat and he
 lium “ash”, which steadily leaks...\n\n\nRobert Davies (Max Planck Institu
 te for Plasma Physics)\n---------------------\nTheoretical and Computation
 al Aspects of the Ideal MHD Equilibrium Free-Boundary Problem\n\nIn the id
 eal MHD equilibrium free-boundary problem, a plasma equilibrium is found w
 hich is consistent with a given background magnetic field. This background
  magnetic field replaces the fixed last closed flux surface, which is typi
 cally used in fixed-boundary equilibria, as a constraint. Free-bounda...\n
 \n\nRobert Köberl, Dean Muir, Florian Hindenlang, Omar Maj, and Robert Bab
 in (Max Planck Institute for Plasma Physics)\n---------------------\nSPECT
 RE: A Fast and Robust Solver for MHD Equilibria with Arbitrary Magnetic To
 pology\n\nWe present the development of a new equilibrium code, SPECTRE, w
 hich robustly solves the MRxMHD equations which describe partially-relaxed
  steady-state plasma configurations with arbitrary topology. SPECTRE divid
 es a plasma domain into subvolumes, solves for linear Beltrami field withi
 n each of thes...\n\n\nErol Balkovic, Joaquim Loizu, and Chris Smiet (EPFL
 )\n\nDomain: Physics, Computational Methods and Applied Mathematics\n\nSes
 sion Chair: Florian Hindenlang (Max Planck Institute for Plasma Physics)
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