Results 71 to 80 of about 2,047 (170)

Direct optimization of neoclassical ion transport in stellarator reactors

Nuclear Fusion
We directly optimize stellarator neoclassical ion transport while holding neoclassical electron transport at a moderate level, creating a scenario favorable for impurity expulsion and retaining good ion confinement.
B.F. Lee, S.A. Lazerson, H.M. Smith, C.D. Beidler, N.A. Pablant   +4 more
doaj   +1 more source

Precise stellarator quasi-symmetry can be achieved with electromagnetic coils. [PDF]

Proc Natl Acad Sci U S A, 2022
Wechsung F, Landreman M, Giuliani A, Cerfon A, Stadler G.   +4 more
europepmc   +1 more source

Optimization of compact quasi-axisymmetric stellarators

Plasma Physics and Controlled Fusion
Abstract We present the optimization of compact quasi-axisymmetric stellarators with aspect ratio as low as A = 2.4 and varying number of field periods. This previously unexplored optimization space has the striking feature that the symmetry-preserving perturbations remain mostly on the inboard side, and that the axisymmetric volume is ...
Tobias M Schuett, Sophia A Henneberg
openaire   +3 more sources

Suppressing trapped-electron-mode-driven turbulence via optimization of three-dimensional shaping

Nuclear Fusion
Turbulent transport driven by trapped electron modes (TEMs) is believed to drive significant heat and particle transport in quasihelically symmetric stellarators.
J.M. Duff, B.J. Faber, C.C. Hegna, M.J. Pueschel, P.W. Terry   +4 more
doaj   +1 more source

Numerical studies on electron cyclotron resonance heating and optimization in the CN-H1 stellarator

Nuclear Engineering and Technology
The H1-NF stellarator in the Australian National University has been transported to University of South China and is currently being restored and reconstructed to the CN-H1 stellarator.
Chun Yan Li, Ping Wei Zheng, Xue Yu Gong, Zheng Kun Gao, Xin Chen Jiang   +4 more
doaj   +1 more source

Global stellarator coil optimization with quadratic constraints and objectives

Nuclear Fusion
Most present stellarator designs are produced by costly two-stage optimization: the first for an optimized equilibrium, and the second for a coil design reproducing its magnetic configuration.
Lanke Fu, Elizabeth J. Paul, Alan A. Kaptanoglu, Amitava Bhattacharjee   +3 more
doaj   +1 more source

Existence of weakly quasisymmetric magnetic fields without rotational transform in asymmetric toroidal domains. [PDF]

Sci Rep, 2022
Sato N.
europepmc   +1 more source

Reactor-scale stellarators with force and torque minimized dipole coils

Nuclear Fusion
In this work, we utilize new coil objectives for stellarator optimization with autodifferentiation, including pointwise and net coil–coil forces and torques. We use these methods to perform the first large-scale optimization of planar dipole coil arrays,
Alan A. Kaptanoglu, Alexander Wiedman, Jacob Halpern, Siena Hurwitz, Elizabeth J. Paul, Matt Landreman   +5 more
doaj   +1 more source

Demonstration of reduced neoclassical energy transport in Wendelstein 7-X. [PDF]

Nature, 2021
Beidler CD, Smith HM, Alonso A, Andreeva T, Baldzuhn J, Beurskens MNA, Borchardt M, Bozhenkov SA, Brunner KJ, Damm H, Drevlak M, Ford OP, Fuchert G, Geiger J, Helander P, Hergenhahn U, Hirsch M, Höfel U, Kazakov YO, Kleiber R, Krychowiak M, Kwak S, Langenberg A, Laqua HP, Neuner U, Pablant NA, Pasch E, Pavone A, Pedersen TS, Rahbarnia K, Schilling J, Scott ER, Stange T, Svensson J, Thomsen H, Turkin Y, Warmer F, Wolf RC, Zhang D, W7-X Team.   +39 more
europepmc   +1 more source

Targeted Optimization of Quasi-Symmetric Stellarators

, 2016
The proposed research focuses on targeted areas of plasma physics dedicated to improving the stellarator concept. Research was pursued in the technical areas of edge/divertor physics in 3D configurations, magnetic island physics in stellarators, the role of 3D shaping on microinstabilities and turbulent transport and energetic ion confinement in ...
Chris C. Hegna, D. T. Anderson, J. N. Talmadge   +2 more
openaire   +2 more sources