On the heating mix of ITER

F. Wagner, A. Becoulet, R. Budny, V. Erckmann, D. Farina, G. Giruzzi, Y. Kamada, A. Kaye, F. Koech, K. Lackner, N. Marushchenko, M. Murakami, T. Oikawa, V. Parail, J.M. Park, G. Ramponi, O. Sauter, D. Stork, P.R. Thomas, Q.M. TranD. Ward, H. Zohm, C. Zucca

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Abstract

This paper considers the heating mix of ITER for the two main scenarios. Presently, 73MWof absorbed power are foreseen in the mix 20/33/20 for ECH, NBI and ICH. Given a sufficient edge stability, Q = 10-the goal of scenario 2-can be reached with 40MW power irrespective of the heating method but depends sensitively inter alia on the H-mode pedestal temperature, the density profile shape and on the characteristics of impurity transport. ICH preferentially heats the ions and would contribute specifically with ΔQ 0.5, and strong off-axis current drive (CD). The findings presented here are based on revised CD efficiencies γ for ECCD and a detailed benchmark of several CD codes. With ECCD alone, the goals of scenario 4 can hardly be reached. Efficient off-axisCDis only possible with NBI.With beams, inductive discharges with fni> 0.8 can be maintained for 3000 s. The conclusion of this study is that the present heating mix of ITER is appropriate. It provides the necessary actuators to induce in a flexible way the best possible scenarios. The development risks of NBI at 1MeV can be reduced by operation at 0.85MeV. © 2010 IOP Publishing Ltd.
Original languageEnglish
Article number124044
Pages (from-to)-
JournalPlasma Physics and Controlled Fusion
Volume52
Issue number12
DOIs
Publication statusPublished - Dec 2010
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Condensed Matter Physics

Cite this

Wagner, F., Becoulet, A., Budny, R., Erckmann, V., Farina, D., Giruzzi, G., ... Zucca, C. (2010). On the heating mix of ITER. Plasma Physics and Controlled Fusion, 52(12), -. [124044]. https://doi.org/10.1088/0741-3335/52/12/124044