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  New Schemes for Confinement of Fusion Products in Stellarators

Nührenberg, J., Cooper, W. A., Isaev, M. Y., Heyn, M. F., Kalyuzhnyj, V. N., Kasilov, S. V., et al. (2003). New Schemes for Confinement of Fusion Products in Stellarators. In Fusion Energy 2002. Vienna: International Atomic Energy Agency.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-3D03-1 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-3D04-0
Genre: Conference Paper

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 Creators:
Nührenberg, J.1, Author              
Cooper, W. A.2, Author
Isaev, M. Yu.2, Author
Heyn, M. F.2, Author
Kalyuzhnyj, V. N.2, Author
Kasilov, S. V.2, Author
Kernbichler, W.2, Author
Kuyanov, A. Yu.2, Author
Mikhailov, M. I.2, Author
Nemov, V. V.2, Author
Samitov, M. A.2, Author
Shafranov, V. D.2, Author
Skovoroda, A. A.2, Author
Subbotin, A. A.2, Author
Zille, R.1, Author              
Zvonkov, A. V.2, Author
Affiliations:
1Stellarator Theory (ST), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856287              
2Russian Research Centre "Kurchatov Institute", Moscow, Russia; Centre de Recherches en Physique des Plasma, Ass. Euratom-Confederation Suisse, Ecole Polytechnique Federale de Lausanne, Switzerland; Institute of Plasma Physics, National Science Center "Kharkov institute of Physics and Technology", Kharkov, Ukraine; Institut für Theoretische Physik, Technische Universität Graz, Graz, Austria; Moscow State Engineering and Physics Institute, Moscow, Russia, ou_persistent22              

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 Abstract: The condition of poloidal closure of the contours of the second adiabatic invariant for all reflected particles is studied for stellarators with poloidally closed contours of the magnetic field strength B on the magnetic surfaces through computational stellarator optimization. It is shown that this is possible in a major fraction of the plasma volume and results in excellent alpha-particle confinement. Most importantly the magnetic axis curvature vanishes in all cross-sections with an extremum of B on the magnetic axis. Toroidal mirror traps are investigated with respect to isometry, i.e. the lengths of field lines on a magnetic surface between any two contours of B are equal and the contours of the second adiabatic invariant coincide with the magnetic surfaces. Analytical methods are used to design a vacuum field toroidal mirror trap satisfying this isometry condition. The boundary surface of such a configuration is a well-defined finite-sized toroidal surface. This provides the interface to the VMEC, JMC and MCT codes which allow analyses of equilibrium and neoclassical properties.

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Language(s): eng - English
 Dates: 2003
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: Internal
 Degree: -

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Title: 19th Fusion Energy Conference
Place of Event: Lyon (FR)
Start-/End Date: 2002-10-14 - 2002-10-19

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Title: Fusion Energy 2002
Source Genre: Proceedings
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Publ. Info: Vienna : International Atomic Energy Agency
Pages: CD-ROM Volume / Issue: - Sequence Number: IC/P-06 Start / End Page: - Identifier: -