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Major results from Wendelstein 7-AS stellarator

MPS-Authors
/persons/resource/persons110725

Wagner,  F.
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons108825

Burhenn,  R.
VINETA, Max Planck Institute for Plasma Physics, Max Planck Society;
W7-AS, Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109156

Geiger,  J.
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109397

Hirsch,  M.
W7-X: Physics (PH), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons110770

Weller,  A.
Stellarator Scenario Development (E5), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons110781

Werner,  A.
W7-X: Physics (PH), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons108602

Bäumel,  S.
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons108767

Brakel,  R.
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons108944

Dinklage,  A.
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109226

Grigull,  P.
W7-X: Physics (PH), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109027

Endler,  M.
Stellarator Scenario Development (E5), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109043

Erckmann,  V.
W7-X: Physics (PH), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109011

Ehmler,  H.
Stellarator Scenario Development (E5), Max Planck Institute for Plasma Physics, Max Planck Society;
VINETA, Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109074

Feng,  Y.
W7-X: Theory, Max Planck Institute for Plasma Physics, Max Planck Society;
W7-AS, Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109090

Fischer,  R.
Centre for Interdisciplinary Plasma Science (CIPS), Max Planck Institute for Plasma Physics, Max Planck Society;
Surface Science (OP), Max Planck Institute for Plasma Physics, Max Planck Society;

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Giannone,  L.
Experimental Plasma Physics 1 (E1), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109309

Hartfuss,  H.-J.
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109390

Hildebrandt,  D.
Plasma Diagnostics Group (HUB), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109474

Igitkhanov,  Y.
Stellarator System Studies, Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109491

Jaenicke,  R.
W7-AS, Max Planck Institute for Plasma Physics, Max Planck Society;
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109609

Kisslinger,  J.
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109625

Klinger,  T.
Stellarator Scenario Development (E5), Max Planck Institute for Plasma Physics, Max Planck Society;
VINETA, Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109629

Klose,  S.
Plasma Diagnostics Group (HUB), Max Planck Institute for Plasma Physics, Max Planck Society;
Experimental Plasma Physics 2 (E2), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109653

König,  R.
W7-X: Physics (PH), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109723

Kühner,  G.
Computer Center Garching (RZG), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109858

Maassberg,  H.
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;

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McCormick,  K.
Stellarator Scenario Development (E5), Max Planck Institute for Plasma Physics, Max Planck Society;
W7-AS, Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons110035

Naujoks,  D.
Plasma Diagnostics Group (HUB), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons110054

Niedermeyer,  H.
W7-X: Construction, Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons110071

Nührenberg,  C.
Stellarator Theory (ST), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons110111

Pasch,  E.
Stellarator Optimisation (E3), Max Planck Institute for Plasma Physics, Max Planck Society;

Ramasubramanian,  N.
Max Planck Society;

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Rust,  N.
W7-X: Heating (HT), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons110310

Sallander,  E.
Stellarator Scenario Development (E5), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons110320

Sardei,  F.
W7-X: Theory, Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons110778

Wenzel,  U.
Plasma Diagnostics Group (HUB), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons110819

Wobig,  H.
Stellarator Theory (ST), Max Planck Institute for Plasma Physics, Max Planck Society;

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Würsching,  E.
Experimental Plasma Physics 1 (E1), Max Planck Institute for Plasma Physics, Max Planck Society;

W7-AS Team, 
Max Planck Society;

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Citation

Wagner, F., Burhenn, R., Gadelmeier, F., Geiger, J., Hirsch, M., Laqua, H. P., et al. (2003). Major results from Wendelstein 7-AS stellarator. In Fusion Energy 2002. Vienna: International Atomic Energy Agency.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0027-3C37-6
Abstract
W7-AS operates with an island divertor, which utilises the natural edge islands of the low-shear stellarator configuration to divert the plasma. High densities (up to 4×1020m-3) and partly detached divertor conditions have been attained. The details of the divertor operation will be described along with the 3D-efforts to model the divertor observations. At a density beyond 1.5×1020m-3 another confinement bifurcation appears, which allows steady state operation at good energy and low impurity confinement. The transition is possible from a state of normal confinement or from ELMy or quiescent H-modes. Starting with normal confinement, bifurcation is initiated by a broadening of the density profile. This regime can easily be heated above cut-off by ECRH using electron-bernstein-wave mode conversion. The highest beta-values (>3%) are achieved at high density. The relevance of the W7-AS data for Wendelstein 7-X and the Helias-reactor will be discussed.