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  Steady state advanced scenarios at ASDEX Upgrade

Sips, A. C. C., Arslanbekov, R., Atanasiu, C., Becker, W., Becker, G., Behler, K., et al. (2002). Steady state advanced scenarios at ASDEX Upgrade. Plasma Physics and Controlled Fusion, 44(Suppl. 12B), B69-B83.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-42BF-0 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-42C0-A
Genre: Journal Article

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 Creators:
Sips, A. C. C.1, Author              
Arslanbekov, R.2, Author              
Atanasiu, C.3, Author
Becker, W.4, Author              
Becker, G.5, Author              
Behler, K.6, Author              
Behringer, K.7, Author              
Bergmann, A.5, Author              
Bilato, R.5, Author              
Bolshukhin, D.8, Author
Borrass, K.9, Author              
Braams, B.3, Author
Brambilla, M.5, Author              
Braun, F.4, Author              
Buhler, A.1, Author              
Conway, G.1, Author              
Coster, D.5, Author              
Drube, R.6, Author              
Dux, R.7, Author              
Egorov, S.8, Author
Eich, T.1, Author              Engelhardt, K.6, Author              Fahrbach, H. U.1, Author              Fantz, U.7, Author              Faugel, H.4, Author              Foley, M.3, AuthorFournier, K. B.3, AuthorFranzen, P.4, Author              Fuchs, J. C.1, Author              Gafert, J.2, Author              Gantenbein, G.3, AuthorGehre, O.1, Author              Geier, A.1, Author              Gernhardt, J.1, Author              Gruber, O.9, Author              Gude, A.5, Author              Günter, S.5, Author              Haas, G.1, 4, Author              Hartmann, D.4, Author              Heger, B.2, Author              Heinemann, B.4, Author              Herrmann, A.1, Author              Hobirk, J.1, Author              Hofmeister, F.2, Author              Hohenöcker, H.6, Author              Horton, L.1, Author              Igochine, V.9, Author              Jacobi, D.2, Author              Jakobi, M.6, Author              Jenko, F.5, Author              Kallenbach, A.7, Author              Kardaun, O.5, Author              Kaufmann, M.1, 10, Author              Keller, A.6, Author              Kendl, A.9, Author              Kim, J. W.9, Author              Kirov, K.6, 11, Author              Kochergov, R.9, Author              Kollotzek, H.1, Author              Kraus, W.4, Author              Krieger, K.12, Author              Kurzan, B.6, Author              Lang, P. T.1, Author              Lauber, P.5, Author              Laux, M.13, 14, Author              Leuterer, F.4, Author              Lohs, A.1, Author              Lorenz, A.1, Author              Maggi, C.7, Author              Maier, H.8, AuthorMank, K.1, Author              Manso, M. E.3, AuthorMaraschek, M.6, Author              Mast, K. F.2, Author              McCarthy, P.5, Author              Meisel, D.2, Author              Meister, H.6, Author              Meo, F.8, AuthorMerkel, R.6, Author              Merkl, D.1, Author              Mertens, V.1, Author              Monaco, F.6, Author              Mück, A.2, Author              Müller, H. W.1, Author              Münich, M.2, Author              Murmann, H.2, Author              Na, Y. S.1, Author              Neu, G.6, Author              Neu, R.7, Author              Neuhauser, J.2, Author              Noterdaeme, J. M.4, Author              Nunes, I.8, AuthorPautasso, G.5, Author              Peeters, A. G.9, Author              Pereverzev, G.5, Author              Pinches, S.9, Author              Poli, E.5, Author              Proschek, M.3, AuthorPugno, R.2, Author              Quigley, E.8, AuthorRaupp, G.6, Author              Ribeiro, T.2, Author              Riedl, R.4, Author              Riondato, S.8, AuthorRohde, V.1, Author              Roth, J.12, Author              Ryter, F.15, Author              Saarelma, S.3, AuthorSandmann, W.1, Author              Schade, S.2, Author              Schilling, H. B.1, Author              Schneider, W.5, Author              Schramm, G.1, Author              Schweizer, S.1, Author              Scott, B.5, Author              Seidel, U.1, Author              Serra, F.3, AuthorSesnic, S.2, Author              Sihler, C.1, Author              Silva, A.3, AuthorSpeth, E.4, Author              Stäbler, A.4, Author              Steuer, K. H.2, Author              Stober, J.1, Author              Streibl, B.1, Author              Strumberger, E.5, 16, Author              Suttrop, W.6, Author              Tabasso, A.2, Author              Tanga, A.1, Author              Tardini, G.9, Author              Tichmann, C.5, Author              Treutterer, W.1, Author              Troppmann, M.1, Author              Varela, P.3, AuthorVollmer, O.2, Author              Wagner, D.6, Author              Wenzel, U.13, Author              Wesner, F.2, Author              Wolf, R.1, Author              Wolfrum, E.1, Author              Würsching, E.1, Author              Yu, Q.5, Author              Zasche, D.1, Author              Zehetbauer, T.6, Author              Zehrfeld, H. P.9, Author              Zohm, H.6, Author               more..
Affiliations:
1Experimental Plasma Physics 1 (E1), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856295              
2External Organizations, ou_persistent22              
3Princeton Univ, Princeton, NJ 08544 USA; Tech Univ St Petersburg, CIS, St Petersburg, Russia; Univ Augsburg, D-8900 Augsburg, Germany; Natl Univ Ireland Univ Coll Cork, Cork, Ireland; Lawrence Livermore Natl Lab, Livermore, CA USA; Univ Stuttgart, IPF, D-7000 Stuttgart, Germany; EURATOM, IST, Lisbon, Portugal; IAP, Vienna, Austria; VTT Tekes, HUT Tekes, Helsinki, Finland, ou_persistent22              
4Technology (TE), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856318              
5Tokamak Theory (TOK), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856309              
6Experimental Plasma Physics 2 (E2), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856292              
7Experimental Plasma Physics 4 (E4), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856293              
8Max Planck Society, ou_persistent13              
9Tokamak Theory (TOK), Max Planck Institute for Plasma Physics, Max Planck Society
10Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856291              
11Tokamak: Edge and Divertor Physics (E2), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856308              
12Material Research (MF), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856328              
13Plasma Diagnostics Group (HUB), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856324              
14W7-X: Physics (PH), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856305              
15Tokamak Edge and Divertor Physics (E2), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856308              
16Relativistic Plasmas, Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856330              

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 Abstract: Recent experiments at ASDEX Upgrade have achieved advanced scenarios with high beta(N) (> 3) and confinement enhancement over ITER98(y, 2) scaling, H-H98y2 = 1.1-1.5, in steady state. These discharges have been obtained in a modified divertor configuration for ASDEX Upgrade, allowing operation at higher triangularity, and with a changed neutral beam injection (NBI) system, for a more tangential, off-axis beam deposition. The figure of merit, beta(N)H(ITER89-P) reaches up to 7.5 for several seconds in plasmas approaching stationary conditions. These advanced tokamak discharges have low magnetic shear in the centre, with q on-axis near 1, and edge safety factor, q(95) in the range 3.3-4.5. This q-profile is sustained by the bootstrap current, NBI-driven current and fishbone activity in the core. The off-axis heating leads to a strong peaking of the density profile and impurity accumulation in the core. This can be avoided by adding some central heating from ion cyclotron resonance heating or electron cyclotron resonance heating, since the temperature profiles are stiff in this advanced scenario (no internal transport barrier). Using a combination of NBI and gas fuelling line, average densities up to 80-90% of the Greenwald density are achieved, maintaining good confinement. The best integrated results in terms of confinement, stability and ability to operate at high density are obtained in highly shaped configurations, near double null, with delta = 0.43. At the highest densities, a strong reduction of the edge localized mode activity similar to type 11 activity is observed, providing a steady power load on the divertor, in the range of 6 MW m(-2), despite the high input power used (> 10 MW).

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Language(s): eng - English
 Dates: 2002
 Publication Status: Published in print
 Pages: -
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 Rev. Method: Peer
 Identifiers: eDoc: 21225
ISI: 000180907400009
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Title: Plasma Physics and Controlled Fusion
  Alternative Title : Plasma Phys. Control. Fusion
Source Genre: Journal
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Pages: - Volume / Issue: 44 (Suppl. 12B) Sequence Number: - Start / End Page: B69 - B83 Identifier: ISSN: 0741-3335