Results 131 to 140 of about 2,047 (170)

Optimization of Stellarator Reactor Parameters

Fusion Science and Technology, 2005
Four quasi-axisymmetric compact stellarator plasma and coil configurations are analyzed for their potential as reactors. A 0-D (volume-average) approach for optimizing the main reactor parameters allows study of the relationship between global parameters and the compatibility of different constraints for a given power output including plasma-coil ...
J. F. Lyon, L. P. Ku, P. Garabedian, L. El-Guebaly, L. Bromberg   +4 more
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Optimization of finite-build stellarator coils

Journal of Plasma Physics, 2020
Finding coil sets with desirable physics and engineering properties is a crucial step in the design of modern stellarator devices. Existing stellarator coil optimization codes ultimately produce zero-thickness filament coils. However, stellarator coils have finite depth and thickness, which can make the single-filament model a poor approximation ...
Luquant Singh, T. G. Kruger, A. Bader, C. Zhu, S. R. Hudson, D. T. Anderson   +5 more
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Optimization of the MHH stellarator

Communications on Pure and Applied Mathematics, 1997
Summary: The modular Helias-like Heliac (MHH) is a coil configuration selected two years ago for the U.S. stellarator power plant study. Since that time the design has been significantly improved by running a collection of three-dimensional plasma physics codes.
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Stellarator optimization studies in W7-AS

Plasma Physics and Controlled Fusion, 1996
Wendelstein 7-AS is the first large-scale modular stellarator, partially optimized with respect to reduced equilibrium currents . It therefore plays an important role for the optimized next step stellarator W7-X as a pilot experiment for manufacturing techniques of coils and vessel and for equilibrium and neo-classical transport properties of the ...
Hofmann, J., Baldzuhn, J. ; https://orcid.org/0000-0001-5667-351X, Brakel, R., Feng, Y., Fiedler, S., Geiger, J., Grigull, P., Herre, G., Jaenicke, R., Kick, M., Kisslinger, J., Kuhner, G., Penningsfeld, F., Runow, A., Sardei, F., Stroth, U., Wagner, F., Weller, A., Wobig, H.   +18 more
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Stellar Mesh Simplification Using Probabilistic Optimization

Computer Graphics Forum, 2004
AbstractThis paper proposes the stellar mesh simplification method, a fast implementation of the Four‐Face Cluster (FFC) algorithm. In this method, a probabilistic optimization heuristic substitutes the priority queue of the original method, which results in a 40% faster algorithm with the same order of distortion. It extends naturally to a progressive
Antônio W. Vieira, Thomas Lewiner, Luiz Velho, Hélio Lopes, Geovan Tavares   +4 more
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Optimal design of relativistic stellar models

Physica Scripta, 2023
Abstract A new approach to construct relativistic stellar models is presented. The problem is formulated as an optimal control problem, with an objective function to be optimized. As illustration, the problem is formulated and solved, with the rest mass as the objective function to be minimized, in three cases.
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Optimization techniques for modular stellarator coils

Nuclear Fusion, 1982
Introduction of a non-sinusoidal deformation can enhance the efficacy of modular coils for generating magnetic fields with a built-in rotational transform. Techniques are developed that provide an understanding of how specific deformations affect the harmonic content of the magnetic field and thus the properties of the vacuum configuration. A procedure
T.K. Chu, H.P. Furth, J.L. Johnson, C. Ludescher, K.E. Weimer   +4 more
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Ripple transport in ‘transport-optimized’ stellarators

Journal of Plasma Physics, 1987
Transport in ‘transport-optimized’ stellarators at low collision frequencies has been studied using a numerical method of solution of the bounce-averaged Fokker–Planck equation which describes both ripple-trapped and non-ripple-trapped particles in a stellarator.
W. N. G. Hitchon, H. E. Mynick
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Stellar Wind-Inspired Optimization

This paper proposes a heuristic optimization algorithm based on the interaction between stellar winds and planets. This algorithm simulates the effects of global stellar wind exploration, magnetospheric attraction, and magnetotail perturbations on the planet, mapping these processes into an optimization problem and forming a unique multi-mechanism ...
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Some results of stellarator optimization

2015
The collisionless confinement of all reflected particles with orbits that star within the inner half of the plasma of a stellarator with the poloidal direction of the contours of the magnetic field strenght B is shown computationally to be possible. It is also demonstrated that the confinement achieved is well compatible with the fulfilment of Mercier ...
Mikhailov, M.I., Cooper, W.A., Heyn, M.F., Isaev, M.Yu., Ivanov, A.A., Kalyuzhnyj, V.N., Kasilov, S.V., Kerbichler, W., Martynov, A.A., Medvedev, S.Yu., Nemov, V.V., N??hrenberg, J., Poshekhonov, Yu.Yu., Samitov, M.A., Shafranov, V.D., Skovoroda, A.A., Subbotin, A.A., Zille, R.   +17 more
openaire   +1 more source