New advanced operational regime on the W7-AS stellarator

McCormick, K.; Grigull, P.; Burhenn, R.; Brakel, R.; Ehmler, H.; Feng, Y.; Gadelmeier, F.; Giannone, L.; Hildebrandt, D.; Hirsch, M.; Jaenicke, R.; Kisslinger, J.; Klinger, T.; Klose, S.; Knauer, J. P.; König, R.; Kühner, G.; Laqua, H. P.; Naujoks, D.; Niedermeyer, H.; Pasch, E.; Narayanan, R.; Rust, N.; Sardei, F.; Wagner, F.; Weller, A.; Wenzel, U.; Werner, A.

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New advanced operational regime on the W7-AS stellarator

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.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0027-40CA-6 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0027-40CB-4

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Creators:
McCormick, K.¹, Author
Grigull, P.², Author
Burhenn, R.^{3, 4}, Author
Brakel, R.⁵, Author
Ehmler, H.¹, Author
Feng, Y.^{4, 5}, Author
Gadelmeier, F.⁶, Author
Giannone, L.^{4, 5, 7}, Author
Hildebrandt, D.⁸, Author
Hirsch, M.⁵, Author
Jaenicke, R.^{4, 5}, Author
Kisslinger, J.^{4, 5}, Author
Klinger, T.^{1, 3}, Author
Klose, S.^{8, 9}, Author
Knauer, J. P.^{4, 5}, Author
König, R.¹, Author
Kühner, G.^{4, 5}, Author
Laqua, H. P.⁶, Author
Naujoks, D.⁸, Author
Niedermeyer, H.¹⁰, Author
Pasch, E.¹¹, Author         Narayanan, R.¹, Author         Rust, N.¹², Author         Sardei, F.⁵, Author         Wagner, F.⁵, Author         Weller, A.^{1, 5}, Author         Wenzel, U.⁸, Author         Werner, A.², Author          more..

Affiliations:
1Stellarator Scenario Development (E5), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856285
2W7-X: Physics (PH), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856305
3VINETA, Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856311
4W7-AS, Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856310
5Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856291
6External Organizations, ou_persistent22
7Experimental Plasma Physics 1 (E1), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856295
8Plasma Diagnostics Group (HUB), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856324
9Experimental Plasma Physics 2 (E2), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856292
10W7-X: Construction, Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856314
11Stellarator Optimisation (E3), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856329
12W7-X: Heating (HT), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856343

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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.

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Language(s): eng - English

Dates: Date issued: 2002-07-01

Publication Status: Issued

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Rev. Type: Peer

Identifiers: eDoc: 21034
ISI: 000176285700024

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Title: Physical Review Letters

Alternative Title : Phys. Rev. Lett.

Source Genre: Journal

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Pages: - Volume / Issue: 89 (1) Sequence Number: 015001 Start / End Page: - Identifier: ISSN: 0031-9007