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Return To: Session OV2 - Overviews 2 (Monday, 19 October)
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F. Wagner , M. Anton , J. Baldzuhn , J. Bleuel ,
R. Brakel , R. Burhenn , G. Cattanei , M. Endler ,
V. Erckmann , Y. Feng , S. Fiedler , J. Geiger ,
T. Geist , L. Giannone , P. Grigull , H.-J. Hartfuss ,
D. Hartmann , G. Herre , M. Hirsch , E. Holzhauer ,
R. Jänicke , M. Kick , J. Kißlinger ,
J. Koponen , G. Kühner , H. P. Laqua ,
H. Maassberg , F. Sardei , U. Stroth , A. Weller ,
S. Zoletnik , J. H. Chatenet , D. Dorst , A. Elsner ,
C. Görner , H. Hacker , F. Karger ,
J. Knauer , R. König , H. Laqua ,
K. McCormick , Niedermeyer , C. Nührenberg ,
W. Ott , F. P. Penningsfeld , A. Salat , F. Schneider ,
C. Theimer , H. Walter , C. Wendland , A. Werner ,
E. Würsching , P. Zeiler
Max-Planck-Institut für Plasmaphysik, EURATOM Association,
Garching, Germany
Abstract
The Wendelstein stellarator programme of Garching
has developed low shear stellarators with successively optimised designs to
remove the intrinsic deficiencies of this 3D concept. W7-X, presently under
construction, is in internal terminology a fully optimised stellarator. W7-AS ,
the presently operated device, is a partly optimised stellarator . The
optimisation of stellarators aims at improved neoclassical confinement in the
long mean free path regime and improved equilibrium and stability
properties. In this report, we address equilibrium, stability, turbulent and
collisional energy confinement aspects (role of magnetic shear, role of the
radial electric field, low and improved confinement regimes),
particle transport , transport and turbulence at the plasma edge,
high density
operation, ECRH (OXB scheme) and ICRF heating and the development of the
island divertor for exhaust. The maximal parameters achieved in W7-AS (at
different discharge types) are: 
keV, 
keV,
,
,
ms.
IAEA 1999