Steady state advanced scenarios at ASDEX Upgrade

Sips, A. C. C.; Arslanbekov, R.; Atanasiu, C.; Becker, W.; Becker, G.; Behler, K.; Behringer, K.; Bergmann, A.; Bilato, R.; Bolshukhin, D.; Borrass, K.; Braams, B.; Brambilla, M.; Braun, F.; Buhler, A.; Conway, G.; Coster, D.; Drube, R.; Dux, R.; Egorov, S.; Eich, T.; Engelhardt, K.; Fahrbach, H. U.; Fantz, U.; Faugel, H.; Foley, M.; Fournier, K. B.; Franzen, P.; Fuchs, J. C.; Gafert, J.; Gantenbein, G.; Gehre, O.; Geier, A.; Gernhardt, J.; Gruber, O.; Gude, A.; Günter, S.; Haas, G.; Hartmann, D.; Heger, B.; Heinemann, B.; Herrmann, A.; Hobirk, J.; Hofmeister, F.; Hohenöcker, H.; Horton, L.; Igochine, V.; Jacobi, D.; Jakobi, M.; Jenko, F.; Kallenbach, A.; Kardaun, O.; Kaufmann, M.; Keller, A.; Kendl, A.; Kim, J. W.; Kirov, K.; Kochergov, R.; Kollotzek, H.; Kraus, W.; Krieger, K.; Kurzan, B.; Lang, P. T.; Lauber, P.; Laux, M.; Leuterer, F.; Lohs, A.; Lorenz, A.; Maggi, C.; Maier, H.; Mank, K.; Manso, M. E.; Maraschek, M.; Mast, K. F.; McCarthy, P.; Meisel, D.; Meister, H.; Meo, F.; Merkel, R.; Merkl, D.; Mertens, V.; Monaco, F.; Mück, A.; Müller, H. W.; Münich, M.; Murmann, H.; Na, Y. S.; Neu, G.; Neu, R.; Neuhauser, J.; Noterdaeme, J. M.; Nunes, I.; Pautasso, G.; Peeters, A. G.; Pereverzev, G.; Pinches, S.; Poli, E.; Proschek, M.; Pugno, R.; Quigley, E.; Raupp, G.; Ribeiro, T.; Riedl, R.; Riondato, S.; Rohde, V.; Roth, J.; Ryter, F.; Saarelma, S.; Sandmann, W.; Schade, S.; Schilling, H. B.; Schneider, W.; Schramm, G.; Schweizer, S.; Scott, B.; Seidel, U.; Serra, F.; Sesnic, S.; Sihler, C.; Silva, A.; Speth, E.; Stäbler, A.; Steuer, K. H.; Stober, J.; Streibl, B.; Strumberger, E.; Suttrop, W.; Tabasso, A.; Tanga, A.; Tardini, G.; Tichmann, C.; Treutterer, W.; Troppmann, M.; Varela, P.; Vollmer, O.; Wagner, D.; Wenzel, U.; Wesner, F.; Wolf, R.; Wolfrum, E.; Würsching, E.; Yu, Q.; Zasche, D.; Zehetbauer, T.; Zehrfeld, H. P.; Zohm, H.

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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: https://hdl.handle.net/11858/00-001M-0000-0027-42BF-0 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0027-42C0-A

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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: Date issued: 2002

Publication Status: Issued

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Rev. Type: 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