Toroidal plasma rotation induced by the dynamic ergodic divertor in the TEXTOR tokamak

K. H. Finken, S. S. Abdullaev, M. F.M. De Bock, M. Von Hellermann, M. Jakubowski, R. Jaspers, H. R. Koslowski, A. Krämer-Flecken, M. Lehnen, Y. Liang, A. Nicolai, R. C. Wolf, O. Zimmermann, M. DeBaar, G. Bertschinger, W. Biel, S. Brezinsek, C. Busch, A. J.H. Donné, H. G. EsserE. Farshi, H. Gerhauser, B. Giesen, D. Harting, J. A. Hoekzema, G. M.D. Hogeweij, P. W. Hüttemann, S. Jachmich, K. Jakubowska, D. Kalupin, F. Kelly, Y. Kikuchi, A. Kirschner, R. Koch, M. Korten, A. Kreter, J. Krom, U. Kruezi, A. Lazaros, A. Litnovsky, X. Loozen, N. J.Lopes Cardozo, A. Lyssoivan, O. Marchuk, G. Matsunaga, Ph Mertens, A. Messiaen, O. Neubauer, N. Noda, V. Philipps, A. Pospieszczyk, D. Reiser, D. Reiter, A. L. Rogister, M. Sakamoto, A. Savtchkov, U. Samm, O. Schmitz, R. P. Schorn, B. Schweer, F. C. Schüller, G. Sergienko, K. H. Spatschek, G. Telesca, M. Tokar, R. Uhlemann, B. Unterberg, G. Van Oost, T. Van Rompuy, G. Van Wassenhove, E. Westerhof, R. Weynants, S. Wiesen, Y. H. Xu

Research output: Contribution to journalArticlepeer-review

Abstract

The first results of the Dynamic Ergodic Divertor in TEXTOR, when operating in the m/n = 3/1 mode configuration, are presented. The deeply penetrating external magnetic field perturbation of this configuration increases the toroidal plasma rotation. Staying below the excitation threshold for the m/n = 2/1 tearing mode, this toroidal rotation is always in the direction of the plasma current, even if the toroidal projection of the rotating magnetic field perturbation is in the opposite direction. The observed toroidal rotation direction is consistent with a radial electric field, generated by an enhanced electron transport in the ergodic layers near the resonances of the perturbation. This is an effect different from theoretical predictions, which assume a direct coupling between rotating perturbation and plasma to be the dominant effect of momentum transfer.

Original languageEnglish
Article number015003
Pages (from-to)1-5
Number of pages5
JournalPhysical Review Letters
Volume94
Issue number1
DOIs
Publication statusPublished - 14 Jan 2005

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