Results 151 to 160 of about 1,911,396 (184)

Theoretical Optimization of Stellarators

IEEE Transactions on Plasma Science, 1981
Net current free toroidal ("stellarator") confinement is studied with a combination of several methods: a complete set of analytical vacuum fields for finding favorable vacuum field configurations; three-dimensional MHD codes for finite-s, equilibrium computations; the expansion of a general toroidal equilibrium around its magnetic axis as guideline ...
R. Chodura, W. Dommaschk, F. Herrnegger, W. Lotz, J. Nuhrenberg, A. Schluter   +5 more
openaire   +3 more sources

Optimized confinement discharges in the stellarator W7-AS

Plasma Physics and Controlled Fusion, 2000
In addition to the well known H-mode, other types of discharges with enhanced core energy confinement can be observed in the stellarator W7-AS. In this contribution, the properties of some particular examples of those optimized confinement (OC) discharges are presented.
Baldzuhn, J. ; https://orcid.org/0000-0001-5667-351X, Giannone, L., Kick, M., McCormick, K.   +3 more
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Optimizing the Support of a Stellar Sensor

Russian Engineering Research, 2018
The mass of a support for a stellar sensor in a spacecraft is minimized in the light of requirements on the first eigenfrequency and the reactive force in the connectors. Topological and parametric optimization is employed.
A. D. Novokshenov, P. A. Marchenko, A. S. Nemov, A. I. Borovkov   +3 more
openaire   +1 more source

Optimization of Energy Confinement in the 1/ν Regime for Stellarators

Journal of Computational Physics, 2008
For certain conditions the stellarator magnetic field can be originally obtained in the real space coordinates and there is no necessity in its transformation to magnetic coordinates. A procedure working in real space coordinates is presented for maximizing the plasma energy content, based on reducing the most unfavorable \(1/\nu\) neoclassical ...
Victor V. Tribaldos, V V Nemov, S V Kasilov   +2 more
exaly   +3 more sources

Automated Optimization of Stellarator Coils

Fusion Technology, 1998
AbstractA method for finding a set of modular, poloidally closed stellarator coils confining a plasma in a given equilibrium configuration is described. The proposed technique performs a direct nonlinear optimization of the coil shapes with respect both to the desired structure of the magnetic field and to geometric constraints required by the ...
openaire   +2 more sources

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.
openaire   +2 more sources

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
openaire   +1 more source

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
openaire   +2 more sources

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 Wilson Vieira, Thomas Lewiner, Luiz Velho 0001, Hélio Lopes 0001, Geovan Tavares   +4 more
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The theoretical basis of a drift-optimized stellarator reactor

Plasma Physics and Controlled Fusion, 1993
The stellarator is a 3-dimensional toroidal configuration without induced toroidal plasma currents. The magnetic field is produced by external coils which allows steady-state operation of a stellarator reactor. The requirements coming from reactor conditions narrow the range of potential stellarator configurations as reactor candidates; therefore an ...
openaire   +3 more sources