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New advanced operational regime on the W7-AS stellarator

MPS-Authors
/persons/resource/persons109914

McCormick,  K.
Stellarator Scenario Development (E5), 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/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/persons108767

Brakel,  R.
Experimental Plasma Physics 3 (E3), 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;

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

/persons/resource/persons109170

Giannone,  L.
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;
Experimental Plasma Physics 1 (E1), Max Planck Institute for Plasma Physics, Max Planck Society;
W7-AS, 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/persons109397

Hirsch,  M.
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;

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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;
W7-AS, Max Planck Institute for Plasma Physics, Max Planck Society;

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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;

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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;

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Knauer,  J. P.
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;
W7-AS, Max Planck Institute for Plasma Physics, Max Planck Society;

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

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Kühner,  G.
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;

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

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

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

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

/persons/resource/persons110298

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

/persons/resource/persons110320

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

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

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Weller,  A.
Stellarator Scenario Development (E5), Max Planck Institute for Plasma Physics, Max Planck Society;
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;

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

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

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Citation

McCormick, K., Grigull, P., Burhenn, R., Brakel, R., Ehmler, H., Feng, Y., et al. (2002). New advanced operational regime on the W7-AS stellarator. Physical Review Letters, 89(1): 015001.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0027-40CA-6
Abstract
A promising new plasma operational regime on the Wendelstein stellarator W7-AS has been discovered. It is extant above a threshold density and characterized by flat density profiles, high energy and low impurity confinement times, and edge- localized radiation. Impurity accumulation is avoided. Quasistationary discharges with line-averaged densities (n) over bar (e) to 4x10(20) m(-3) , radiation levels to 90% , and partial plasma detachment at the divertor target plates can be simultaneously realized. Energy confinement is up to twice that of a standard scaling. At B-t=0.9 T , an average beta value of 3.1% is achieved. The high (n) over bar (e) values allow demonstration of electron Bernstein wave heating using linear mode conversion.