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Contribution of Tore Supra in preparation of ITER

Saoutic, B. and Abiteboul, J. and Allegretti, L. and Allfrey, S. and Ané, J.M. and Aniel, T. and Argouarch, A. and Artaud, J.F. and Aumenier, M.H. and Balme, S. and Basiuk, V. and Baulaigue, O. and Bayetti, P. and Bécoulet, A. and Bécoulet, M. and Benkadda, M.S. and Benoit, F. and Berger-by, G. and Bernard, J.M. and Bertrand, B. and Beyer, P. and Bigand, A. and Blum, J. and Boilson, D. and Bonhomme, G. and Bottollier-Curtet, H. and Bouchand, C. and Bouquey, F. and Bourdelle, C. and Bourmaud, S. and Brault, C. and Brémond, S. and Brosset, C. and Bucalossi, J. and Buravand, Y. and Cara, P. and Catherine-Dumont, V. and Casati, A. and Chantant, M. and Chatelier, M. and Chevet, G. and Ciazynski, D. and Ciraolo, G. and Clairet, F. and Coatanea-Gouachet, M. and Colas, L. and Commin, L. and Corbel, E. and Corre, Y. and Courtois, X. and Dachicourt, R. and Febrer, M. Dapena and Joanny, M. Davi and Daviot, R. and Esch, H. De and Decker, Joan and Decool, P. and Delaporte, P. and Delchambre, E. and Delmas, E. and Delpech, L. and Desgranges, C. and Devynck, P. and Dittmar, T. and Doceul, L. and Douai, D. and Dougnac, H. and Duchateau, J.L. and Dugué, B. and Dumas, N. and Dumont, R. and Durocher, A. and Duthoit, F.X. and Ekedahl, A. and Elbeze, D. and Khaldi, M. El and Escourbiac, F. and Faisse, F. and Falchetto, G. and Farge, M. and Farjon, J.L. and Faury, M. and Fedorczak, N. and Fenzi-Bonizec, C. and Firdaouss, M. and Frauel, Y. and Garbet, X. and Garcia, J. and Gardarein, J.L. and Gargiulo, L. and Garibaldi, P. and Gauthier, E. and Gaye, O. and Géraud, A. and Geynet, M. and Ghendrih, P. and Giacalone, I. and Gibert, S. and Gil, C. and Giruzzi, G. and Goniche, M. and Grandgirard, V. and Grisolia, C. and Gros, G. and Grosman, A. and Guigon, R. and Guilhem, D. and Guillerminet, B. and Guirlet, R. and Gunn, J. and Gurcan, O. and Hacquin, S. and Hatchressian, J.C. and Hennequin, P. and Hernandez, C. and Hertout, P. and Heuraux, S. and Hillairet, J. and Hoang, G.T. and Honore, C. and Houry, M. and Hutter, T. and Huynh, P. and Huysmans, G. and Imbeaux, F. and Joffrin, E. and Johner, J. and Jourd'Heuil, L. and Katharria, Y.S. and Keller, D. and Kim, S.H. and Kocan, M. and Kubic, M. and Lacroix, B. and Lamaison, V. and Latu, G. and Lausenaz, Y. and Laviron, C. and Leroux, F. and Letellier, L. and Lipa, M. and Litaudon, X. and Loarer, T. and Lotte, P. and Madeleine, S. and Magaud, P. and Maget, P. and Magne, R. and Manenc, L. and Marandet, Y. and Marbach, G. and Maréchal, J.L. and Marfisi, L. and Martin, C. and Martin, G. and Martin, V. and Martinez, A. and Martins, J.P. and Masset, R. and Mazon, D. and Mellet, N. and Mercadier, L. and Merle, A. and Meshcheriakov, D. and Meyer, O. and Million, L. and Missirlian, M. and Mollard, P. and Moncada, V. and Monier-Garbet, P. and Moreau, D. and Moreau, P. and Morini, Lorenzo and Nannini, M. and Habib, M. Naiim and Nardon, E. and Nehme, H. and Nguyen, C. and Nicollet, S. and Nouilletas, R. and Ohsako, T. and Ottaviani, M. and Pamela, S. and Parrat, H. and Pastor, P. and Pecquet, A.L. and Pégourié, B. and Peysson, Y. and Porchy, I. and Portafaix, C. and Preynas, M. and Prou, M. and Raharijaona, J.M. and Ravenel, N. and Reux, C. and Reynaud, P. and Richou, M. and Roche, H. and Roubin, P. and Sabot, R. and Saint-Laurent, F. and Salasca, S. and Samaille, F. and Santagiustina, A. and Sarazin, Y. and Semerok, A. and Schlosser, J. and Schneider, M. and Schubert, M. and Schwander, F. and Ségui, J.L. and Selig, G. and Sharma, P. and Signoret, J. and Simonin, A. and Song, S. and Sonnendruker, E. and Sourbier, F. and Spuig, P. and Tamain, P. and Tena, M. and Theis, J.M. and Thouvenin, D. and Torre, A. and Travère, J.M. and Tsitrone, E. and Vallet, J.C. and Plas, E. Van Der and Vatry, A. and Verger, J.M. and Vermare, L. and Villecroze, F. and Villegas, D. and Volpe, R. and Vulliez, K. and Wagrez, J. and Wauters, T. and Zani, L. and Zarzoso, D. and Zou, X.L. Contribution of Tore Supra in preparation of ITER. Nuclear Fusion, 51 (9). 094014. ISSN 0029-5515 (2011)

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Tore Supra routinely addresses the physics and technology of very long-duration plasma discharges, thus bringing precious information on critical issues of long pulse operation of ITER. A new ITER relevant lower hybrid current drive (LHCD) launcher has allowed coupling to the plasma a power level of 2.7 MW for 78 s, corresponding to a power density close to the design value foreseen for an ITER LHCD system. In accordance with the expectations, long distance (10 cm) power coupling has been obtained. Successive stationary states of the plasma current profile have been controlled in real-time featuring (i) control of sawteeth with varying plasma parameters, (ii) obtaining and sustaining a 'hot core' plasma regime, (iii) recovery from a voluntarily triggered deleterious magnetohydrodynamic regime. The scrape-off layer (SOL) parameters and power deposition have been documented during L-mode ramp-up phase, a crucial point for ITER before the X-point formation. Disruption mitigation studies have been conducted with massive gas injection, evidencing the difference between He and Ar and the possible role of the q = 2 surface in limiting the gas penetration. ICRF assisted wall conditioning in the presence of magnetic field has been investigated, culminating in the demonstration that this conditioning scheme allows one to recover normal operation after disruptions. The effect of the magnetic field ripple on the intrinsic plasma rotation has been studied, showing the competition between turbulent transport processes and ripple toroidal friction. During dedicated dimensionless experiments, the effect of varying the collisionality on turbulence wavenumber spectra has been documented, giving new insight into the turbulence mechanism. Turbulence measurements have also allowed quantitatively comparing experimental results with predictions by 5D gyrokinetic codes: numerical results simultaneously match the magnitude of effective heat diffusivity, rms values of density fluctuations and wavenumber spectra. A clear correlation between electron temperature gradient and impurity transport in the very core of the plasma has been observed, strongly suggesting the existence of a threshold above which transport is dominated by turbulent electron modes. Dynamics of edge turbulent fluctuations has been studied by correlating data from fast imaging cameras and Langmuir probes, yielding a coherent picture of transport processes involved in the SOL. Corrections were made to this article on 6 January 2012. Some of the letters in the text were missing.

Item Type: Article
Identification Number: 10.1088/0029-5515/51/9/094014
Additional Information: Special issue: overview and summary reports based on the 2010 Fusion Energy Conference contributions (Daejeon, South Korea, 11–16 October 2010)
Subjects: Q Science > QC Physics
T Technology > T Technology (General)
Research Area: Computer Science and Applications
Depositing User: Caterina Tangheroni
Date Deposited: 15 Mar 2016 08:52
Last Modified: 18 Mar 2016 11:01
URI: http://eprints.imtlucca.it/id/eprint/3232

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