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  Island divertor experiments on the Wendelstein 7-AS stellarator

McCormick, K., Grigull, P., Burhenn, R., Brakel, R., Ehmler, H., Feng, Y., et al. (2003). Island divertor experiments on the Wendelstein 7-AS stellarator. Journal of Nuclear Materials, 1131-1140. doi:10.1016/S0022-3115(02)01506-4.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-2361-1 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-FEBE-D
Genre: Journal Article

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 Creators:
McCormick, K.1, 2, Author              
Grigull, P.3, Author              
Burhenn, R.2, 4, Author              
Brakel, R.5, Author              
Ehmler, H.1, 4, Author              
Feng, Y.2, 6, Author              
Fischer, R.7, 8, Author              
Gadelmeier, F.9, Author              
Giannone, L.10, Author              
Hildebrandt, D.11, Author              
Hirsch, M.3, Author              
Holzhauer, E.9, Author              
Jaenicke, R.2, 5, Author              
Kisslinger, J.5, Author              
Klinger, T.1, 4, Author              
Klose, S.11, 12, Author              
Knauer, J. P.9, Author              
König, R.3, Author              
Kühner, G.13, Author              
Laqua, H. P.9, Author              
Naujoks, D.11, Author              Niedermeyer, H.14, Author              Pasch, E.15, Author              Narayanan, R.16, Author              Rust, N.17, Author              Sardei, F.6, Author              Wagner, F.5, Author              Weller, A.1, Author              Wenzel, U.11, Author              Werner, A.3, Author               more..
Affiliations:
1Stellarator Scenario Development (E5), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856285              
2W7-AS, Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856310              
3W7-X: Physics (PH), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856305              
4VINETA, Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856311              
5Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856291              
6W7-X: Theory, Max Planck Institute for Plasma Physics, Max Planck Society, ou_persistent22              
7Centre for Interdisciplinary Plasma Science (CIPS), Max Planck Institute for Plasma Physics, Max Planck Society, ou_2074325              
8Surface Science (OP), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856288              
9External Organizations, ou_persistent22              
10Experimental Plasma Physics 1 (E1), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856295              
11Plasma Diagnostics Group (HUB), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856324              
12Experimental Plasma Physics 2 (E2), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856292              
13Computer Center Garching (RZG), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856297              
14W7-X: Construction, Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856314              
15Stellarator Optimisation (E3), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856329              
16Experimental Plasma Physics 4 (E4), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856293              
17W7-X: Heating (HT), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856343              

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Free keywords: 15th International Conference on Plasma Surface Interactions in Controlled Fusion Devices (PSI 15), Gifu, 2002-05-26 to 2002-05-31
 Abstract: A promising new operational regime on the Wendelstein stellarator W7-AS has been discovered, fulfilling the conditions of optimal core behavior in combination with edge parameters suitable for successful divertor scenarios. This regime, the high density H-mode (HDH), displays no systematically evident mode activity, and is edge localized mode (ELM)-free. It is extant above a power-dependent threshold density and characterized by flat density profiles, high energy- and low impurity-confinement times and edge-localized radiation. Impurity accumulation, normally associated with ELM-free H-modes, is avoided. Quasi-stationary discharges with line-averaged densities ne to 4×10²⁰ 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 predicted by a conventional scaling. HDH has been attained for both H⁺ and D⁺ plasmas. The development of plasma energy as a function of density shows an isotopic dependence.

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

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Title: Journal of Nuclear Materials
  Alternative Title : J. Nucl. Mater.
Source Genre: Journal
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Publ. Info: Copyright © 2003 Elsevier Science B.V. All rights reserved
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 1131 - 1140 Identifier: -