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  Overview of ASDEX Upgrade results

Zohm, H., Angioni, C., Arslanbekov, R., Atanasiu, C., Becker, G., Becker, W., et al. (2003). Overview of ASDEX Upgrade results. Nuclear Fusion, 43, 1570-1582. doi:10.1088/0029-5515/43/12/004.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-3D27-2 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-3D28-F
Genre: Journal Article

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 Creators:
Zohm, H.1, Author              
Angioni, C.2, Author              
Arslanbekov, R.3, Author              
Atanasiu, C.4, Author
Becker, G.2, Author              
Becker, W.5, Author              
Behler, K.1, Author              
Behringer, K.6, 7, Author              
Bergmann, A.2, Author              
Bilato, R.2, Author              
Bobkov, V.5, Author              
Bolshukhin, D.8, Author
Bolzonella, T.4, Author
Borrass, K.9, Author              
Brambilla, M.2, Author              
Braun, F.5, Author              
Buhler, A.10, Author              
Carlson, A.10, Author              
Conway, G. D.10, Author              
Coster, D. P.2, Author              
Drube, R.1, Author              Dux, R.7, Author              Egorov, S.4, AuthorEich, T.10, Author              Engelhardt, K.1, Author              Fahrbach, H.-U.10, Author              Fantz, U.7, Author              Faugel, H.5, Author              Finken, K. H.4, AuthorFoley, M.4, AuthorFranzen, P.5, Author              Fuchs, J. C.10, Author              Gafert, J.3, Author              Fournier, K. B.4, AuthorGantenbein, G.4, AuthorGehre, O.10, Author              Geier, A.10, Author              Gernhardt, J.3, Author              Goodman, T.4, AuthorGruber, O.9, Author              Gude, A.2, Author              Günter, S.2, Author              Haas, G.5, 10, Author              Hartmann, D.5, Author              Heger, B.3, Author              Heinemann, B.5, Author              Herrmann, A.10, Author              Hobirk, J.10, Author              Hofmeister, F.3, Author              Hohenöcker, H.1, Author              Horton, L. D.10, Author              Igochine, V.9, Author              Jacchia, A.4, AuthorJakobi, M.1, Author              Jenko, F.2, Author              Kallenbach, A.7, Author              Kardaun, O.2, Author              Kaufmann, M.10, 11, Author              Keller, A.1, Author              Kendl, A.9, Author              Kim, J.-W.9, Author              Kirov, K.1, 12, Author              Kochergov, R.9, Author              Kollotzek, H.10, Author              Kraus, W.5, Author              Krieger, K.13, Author              Kurki-Suonio, T.4, AuthorKurzan, B.1, Author              Lang, P. T.10, Author              Lasnier, C.4, AuthorLauber, P.2, Author              Laux, M.14, Author              Leonard, A. W.4, AuthorLeuterer, F.5, Author              Lohs, A.10, Author              Lorenz, A.10, Author              Lorenzini, R.4, AuthorMaggi, C.7, Author              Maier, H.8, AuthorMank, K.10, Author              Manso, M.-E.4, AuthorMantica, P.4, AuthorMaraschek, M.1, Author              Martines, E.4, AuthorMast, K.-F.3, Author              McCarthy, P.2, Author              Meisel, D.3, Author              Meister, H.1, Author              Meo, F.8, AuthorMerkel, P.2, Author              Merkel, R.1, Author              Merkl, D.10, Author              Mertens, V.10, Author              Monaco, F.1, Author              Mück, A.3, Author              Müller, H. W.10, Author              Münich, M.3, Author              Murmann, H.3, Author              Na, Y.-S.10, Author              Neu, G.1, Author              Neu, R.7, Author              Neuhauser, J.3, Author              Nguyen, F.4, AuthorNishijima, D.8, AuthorNishimura, Y.9, Author              Noterdaeme, J.-M.5, Author              Nunes, I.4, AuthorPautasso, G.2, Author              Peeters, A. G.9, Author              Pereverzev, G.2, Author              Pinches, S. D.9, Author              Poli, E.2, Author              Proschek, M.4, AuthorPugno, R.3, Author              Quigley, E.4, AuthorRaupp, G.1, Author              Reich, M.10, Author              Ribeiro, T.9, Author              Riedl, R.5, Author              Rohde, V.10, Author              Roth, J.13, Author              Ryter, F.15, Author              Saarelma, S.4, AuthorSandmann, W.10, Author              Savtchkov, A.4, AuthorSauter, O.8, AuthorSchade, S.3, Author              Schilling, H.-B.10, Author              Schneider, W.2, Author              Schramm, G.10, Author              Schwarz, E.9, Author              Schweinzer, J.10, Author              Schweizer, S.10, Author              Scott, B. D.2, Author              Seidel, U.10, Author              Serra, F.4, AuthorSesnic, S.3, Author              Sihler, C.10, Author              Silva, A.4, AuthorSips, A. C. C.10, Author              Speth, E.5, Author              Stäbler, A.5, Author              Steuer, K.-H.3, Author              Stober, J.10, Author              Streibl, B.10, Author              Strumberger, E.2, 16, Author              Suttrop, W.1, Author              Tabasso, A.3, Author              Tanga, A.3, Author              Tardini, G.10, Author              Tichmann, C.2, Author              Treutterer, W.10, Author              Troppmann, M.10, Author              Urano, H.1, 12, Author              Varela, P.4, AuthorVollmer, O.3, Author              Wagner, D.1, Author              Wenzel, U.17, Author              Wesner, F.3, Author              Westerhof, E.4, AuthorWolf, R.11, Author              Wolfrum, E.10, Author              Würsching, E.10, Author              Yoon, S.-W.3, Author              Yu, Q.2, Author              Zasche, D.10, Author              Zehetbauer, T.1, Author              Zehrfeld, H.-P.9, Author               more..
Affiliations:
1Experimental Plasma Physics 2 (E2), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856292              
2Tokamak Theory (TOK), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856309              
3External Organizations, ou_persistent22              
4Institute of Atomic Physics, Romania, EURATOM Association; Consorzio RFX, Padova, Italy, EURATOM Association; Technical University, Plasma Physics Department, St. Petersburg, CIS; University of Augsburg, Germany; Institut für Plasmaphysik, FZ Jülich, Germany, EURATOM Association; Physics Department, University College Cork, Association EURATOM-DCU, Ireland; Lawrence Livermore National Laboratory, Livermore, USA; Institut für Plasmaforschung, Stuttgart University, Germany; CRPP, Ecole Polytechnique Federale de Lausanne, Switzerland, EURATOM Association; IFP Milano, Italy, EURATOM Association; Helsinki University of Technology, Finland, EURATOM Association; General Atomics, San Diego, USA; Centro de Fusao Nuclear, IST Lisbon, Portugal, EURATOM Association; CEA Cadarache, France, EURATOM Association; Institute for Applied Physics, Vienna, Austria, EURATOM Association; FOM Rijnhuizen, The Netherlands, EURATOM Association, ou_persistent22              
5Technology (TE), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856318              
6Energy and System Studies, Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856296              
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 1 (E1), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856295              
11Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856291              
12Tokamak: Edge and Divertor Physics (E2), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856308              
13Material Research (MF), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856328              
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              
17Plasma Diagnostics Group (HUB), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856324              

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 Abstract: Recent results from the ASDEX Upgrade experimental campaigns 2001 and 2002 are presented. An improved understanding of energy and particle transport emerges in terms of a 'critical gradient' model for the temperature gradients. Coupling this to particle diffusion explains most of the observed behaviour of the density profiles, in particular, the finding that strong central heating reduces the tendency for density profile peaking. Internal transport barriers (ITBs) with electron and ion temperatures in excess of 20 keV (but not simultaneously) have been achieved. By shaping the plasma, a regime with small type II edge localized modes (ELMs) has been established. Here, the maximum power deposited on the target plates was greatly reduced at constant average power. Also, an increase of the ELM frequency by injection of shallow pellets was demonstrated. ELM free operation is possible in the quiescent H-mode regime previously found in DIII-D which has also been established on ASDEX Upgrade. Regarding stability, a regime with benign neoclassical tearing modes (NTMs) was found. During electron cyclotron current drive (ECCD) stabilization of NTMs, βN could be increased well above the usual onset level without a reappearance of the NTM. Electron cyclotron resonance heating and ECCD have also been used to control the sawtooth repetition frequency at a moderate fraction of the total heating power. The inner wall of the ASDEX Upgrade vessel has increasingly been covered with tungsten without causing detrimental effects on the plasma performance. Regarding scenario integration, a scenario with a large fraction of noninductively driven current (≥50%), but without ITB has been established. It combines improved confinement (τEITER98 ≈ 1.2) and stability (βN ≤ 3.5) at high Greenwald fraction (ne/nGW ≈ 0.85) in steady state and with type II ELMy edge and would offer the possibility for long pulses with high fusion power at reduced current in ITER.

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Language(s): eng - English
 Dates: 2003
 Publication Status: Published in print
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 Rev. Method: Peer
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Title: Nuclear Fusion
  Alternative Title : Nucl. Fusion
Source Genre: Journal
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Pages: - Volume / Issue: 43 Sequence Number: - Start / End Page: 1570 - 1582 Identifier: -