IAEA Fusion Energy Conference 2010

Proceedings of the 23rd IAEA Fusion Energy Conference
Daejeon, 11-16 October 2010

Organized by the International Atomic Energy Agency
and hosted by the Government of the Republic of Korea


(ITR/P1-20) Current Ramps in Tokamaks: from Present Experiments to ITER Scenarios

F. Imbeaux1), V. Basiuk1), R. Budny2), T. Casper3), J. Citrin4), J. Fereira5), A. Fukuyama6), J. Garcia1), Y.V. Gribov3), N. Hayashi7), J. Hobirk8), G.M.D. Hogeweij4), M. Honda7), I.H. Hutchinson9), G. Jackson10), A.A. Kavin11), C.E. Kessel2), R.R. Khayrutdinov12), F. Köchl13), C. Labate14), V.M. Leonov12), X. Litaudon1), P.J. Lomas15), J. Lönnroth16), T. Luce10), V.E. Lukash12), M. Mattei17), D. Mikkelsen2), S. Miyamoto7), Y. Nakamura18), I. Nunes5), V. Parail15), G. Pereverzev8), Y. Peysson1), A. Polevoi3), P. Politzer10), M. Schneider1), G. Sips19), G. Tardini8), I. Voitsekhovitch15), S.M. Wolfe9), V.E. Zhogolev12), ASDEX Upgrade Team, C-Mod Team, DIII-D Team, JET-EFDA Contributors, JT-60U Team, Tore Supra Team, contributors of the EU-ITM ITER Scenario Modelling Group, ITPA “Integrated Operations Scenarios” Topical Group members and experts and ITPA “Transport and Confinement” Topical Group members and experts
1) CEA, IRFM, F-13108 Saint Paul Lez Durance, France
2) Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, NJ USA
3) ITER Organization, Route de Vinon sur Verdon, F-13115 St Paul lez Durance, France
4) FOM Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, Nieuwegein, The Netherlands
5) Association Euratom-IST, Lisboa, Portugal
6) Kyoto University, Sakyo-ku, Kyoto, 606-8501 Japan
7) Japan Atomic Energy Agency, 801-1, Mukouyama, Naka, Ibaraki-ken 311-0193, Japan
8) Max-Planck-Institut für Plasmaphysik, EURATOM-Assoziation, Garching, Germany
9) Plasma Science and Fusion Center, MIT, Cambridge, MA USA
10) General Atomics, San Diego, USA
11) NIIEFA, St. Petersburg, Russia
12) RRC “Kurchatov Institute”, Moscow, Russia
13) Association EURATOM-ÖAW/ATI, Vienna, Austria
14) Associazione ENEA/CREATE, DIMET, Università di Reggio Calabria Via Graziella, 89100, Calabria, Italy
15) EURATOM/CCFE Fusion Association, Culham Science Centre, Abingdon OX14 3DB UK
16) Association EURATOM-TEKES, Helsinki University of Technology, Finland
17) Associazione ENEA/CREATE, DIAM, Seconda Università di Napoli Via Roma 29, 81031, Aversa, Italy
18) Nippon Advanced Technology Co., Ltd. Tokai, Ibaraki 319-1112 Japan

Abstract.  In order to prepare adequate current ramp-up and ramp-down scenarios for ITER, present experiments from various tokamaks have been analysed by means of integrated modelling in view of determining relevant heat transport models for these operation phases. The most accurate heat transport models are then applied to projections to ITER current ramp-up, focusing on the baseline inductive scenario (main heating plateau current of Ip = 15 MA). These projections include a sensitivity studies to various assumptions of the simulation. While the heat transport model is at the heart of such simulations (because of the intrinsic dependence of the plasma resistivity on electron temperature), more comprehensive simulations are required to test all operational aspects of the current ramp-up and ramp-down phases of ITER scenarios. Recent examples of such simulations, involving coupled core transport codes, free boundary equilibrium solvers and a poloidal field (PF) systems controller are described in the second part of the paper, focusing on ITER current ramp-down.

This work is partially supported by EURATOM and partially carried out under EFDA.

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