Advanced search
1 file | 1.22 MB

Overview of ASDEX Upgrade results

(2009) NUCLEAR FUSION. 49(10).
Author
Organization
Abstract
ASDEX Upgrade was operated with a fully W-covered wall in 2007 and 2008. Stationary H-modes at the ITER target values and improved H-modes with H up to 1.2 were run without any boronization. The boundary conditions set by the full W wall (high enough ELM frequency, high enough central heating and low enough power density arriving at the target plates) require significant scenario development, but will apply to ITER as well. D retention has been reduced and stationary operation with saturated wall conditions has been found. Concerning confinement, impurity ion transport across the pedestal is neoclassical, explaining the strong inward pinch of high-Z impurities in between ELMs. In improved H-mode, the width of the temperature pedestal increases with heating power, consistent with a beta(1/2)(pol,ped) scaling. In the area of MHD instabilities, disruption mitigation experiments using massive Ne injection reach volume averaged values of the total electron density close to those required for runaway suppression in ITER. ECRH at the q = 2 surface was successfully applied to delay density limit disruptions. The characterization of fast particle losses due to MHD has shown the importance of different loss mechanisms for NTMs, TAEs and also beta-induced Alfven eigenmodes (BAEs). Specific studies addressing the first ITER operational phase show that O1 ECRH at the HFS assists reliable low-voltage breakdown. During ramp-up, additional heating can be used to vary l(i) to fit within the ITER range. Confinement and power threshold in He are more favourable than in H, suggesting that He operation could allow us to assess H-mode operation in the non-nuclear phase of ITER operation.
Keywords
TRANSPORT, DIVERTOR TOKAMAK, CONFINEMENT, DIII-D

Downloads

  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 1.22 MB

Citation

Please use this url to cite or link to this publication:

Chicago
Zohm, H, J Adamek, C Angioni, G. Antar, CV Atanasiu, M Balden, W Becker, et al. 2009. “Overview of ASDEX Upgrade Results.” Nuclear Fusion 49 (10).
APA
Zohm, H., Adamek, J., Angioni, C., Antar, G., Atanasiu, C., Balden, M., Becker, W., et al. (2009). Overview of ASDEX Upgrade results. NUCLEAR FUSION, 49(10).
Vancouver
1.
Zohm H, Adamek J, Angioni C, Antar G, Atanasiu C, Balden M, et al. Overview of ASDEX Upgrade results. NUCLEAR FUSION. 2009;49(10).
MLA
Zohm, H, J Adamek, C Angioni, et al. “Overview of ASDEX Upgrade Results.” NUCLEAR FUSION 49.10 (2009): n. pag. Print.
@article{2948008,
  abstract     = {ASDEX Upgrade was operated with a fully W-covered wall in 2007 and 2008. Stationary H-modes at the ITER target values and improved H-modes with H up to 1.2 were run without any boronization. The boundary conditions set by the full W wall (high enough ELM frequency, high enough central heating and low enough power density arriving at the target plates) require significant scenario development, but will apply to ITER as well. D retention has been reduced and stationary operation with saturated wall conditions has been found. Concerning confinement, impurity ion transport across the pedestal is neoclassical, explaining the strong inward pinch of high-Z impurities in between ELMs. In improved H-mode, the width of the temperature pedestal increases with heating power, consistent with a beta(1/2)(pol,ped) scaling. In the area of MHD instabilities, disruption mitigation experiments using massive Ne injection reach volume averaged values of the total electron density close to those required for runaway suppression in ITER. ECRH at the q = 2 surface was successfully applied to delay density limit disruptions. The characterization of fast particle losses due to MHD has shown the importance of different loss mechanisms for NTMs, TAEs and also beta-induced Alfven eigenmodes (BAEs). Specific studies addressing the first ITER operational phase show that O1 ECRH at the HFS assists reliable low-voltage breakdown. During ramp-up, additional heating can be used to vary l(i) to fit within the ITER range. Confinement and power threshold in He are more favourable than in H, suggesting that He operation could allow us to assess H-mode operation in the non-nuclear phase of ITER operation.},
  articleno    = {104009},
  author       = {Zohm, H and Adamek, J and Angioni, C and Antar, G. and Atanasiu, CV and Balden, M and Becker, W and Behler, K and Behringer, K and Bergmann, A and Bertoncelli, T and Bilato, R and Bobkov, V and Boom, J and Bottino, A and Brambilla, M and Braun, F and Bruedgam, M. and Buhler, A and Chankin, A and Classen, I and Conway, GD and Coster, DP and de Marne, P and D'Inca, R and Drube, R and Dux, R and Eich, T and Engelhardt, K and Esposito, B and Fahrbach, H-U and Fattorini, L and Fink, J and Fischer, R and Flaws, A and Foley, M and Forest, C and Fuchs, JC and Gal, K and Munoz, M Garcia and Adamov, M Gemisic and Giannone, L and Goerler, T and Gori, S and da Graca, S and Granucci, G and Greuner, H and Gruber, O and Gude, A and Guenter, S and Haas, G and Hahn, D and Harhausen, J and Hauff, T and Heinemann, B and Herrmann, A and Hicks, N and Hobirk, J and Hoelzl, M and Holtum, D and Hopf, C and Horton, L and Huart, M and Igochine, V and Janzer, M and Jenko, F and Kallenbach, A and Kalvin, S and Kardaun, O and Kaufmann, M and Kick, M and Kirk, A and Klingshirn, HJ and Koscis, G and Kollotzek, H and Konz, C and Krieger, K and Kurki-Suonio, T and Kurzan, B and Lackner, K and Lang, PT and Langer, B and Lauber, P and Laux, M and Leuterer, F and Likonen, J and Liu, L and Lohs, A and Lunt, T and Lyssoivan, A and Maggi, CF and Manini, A and Mank, K and Manso, ME and Mantsinen, M and Maraschek, M and Martin, P and Mayer, M and McCarthy, P and McCormick, K and Meister, H and Meo, F and Merkel, P and Merkel, R and Mertens, V and Merz, F and Meyer, H and Mlynek, A and Monaco, F and Mueller, HW and Muenich, M and Murmann, H and Neu, G and Neu, R and Neuhauser, J and Nold, B and Noterdaeme, Jean-Marie and Pautasso, G and Pereverzev, G and Poli, E and Potzel, S and Pueschel, M and Puetterich, T and Pugno, R and Raupp, G and Reich, M and Reiter, B and Ribeiro, T and Riedl, R and Rohde, V and Roth, J and Rott, M and Ryter, F and Sandmann, W and Santos, J and Sassenberg, K and Sauter, P and Scarabosio, A and Schall, G and Schilling, HB and Schirmer, J and Schmid, A and Schmid, K and Schneider, W and Schramm, G and Schrittwieser, R and Schustereder, W and Schweinzer, J and Schweizer, S and Scott, B and Seidel, U and Sempf, M and Serra, F and Sertoli, M and Siccinio, M and Sigalov, A and Silva, A and Sips, CC and Speth, E and Staebler, A and Stadler, R and Steuer, KH and Stober, J and Streibl, B and Strumberger, E and Suttrop, W and Tardini, G and Tichmann, C and Treutterer, W and Troester, C and Urso, L and Vainonen-Ahlgren, E and Varela, P and Vermare, L and Volpe, F and Wagner, D and Wigger, C and Wischmeier, M and Wolfrum, E and Wuersching, E and Yadikin, D and Yu, Q and Zasche, D and Zehetbauer, T and Zilker, M},
  issn         = {0029-5515},
  journal      = {NUCLEAR FUSION},
  language     = {eng},
  number       = {10},
  pages        = {10},
  title        = {Overview of ASDEX Upgrade results},
  url          = {http://dx.doi.org/10.1088/0029-5515/49/10/104009},
  volume       = {49},
  year         = {2009},
}

Altmetric
View in Altmetric
Web of Science
Times cited: