Corroborating evidence is presented that the sawtooth period can follow the modulation frequency of an externally applied high power electron cyclotron wave source. Precise, fast and robust open loop control of the sawtooth period with a continuously changing reference period has been achieved. This period locking is not associated with the crash, but with the phase evolution of the inter-crash dynamics. This opens new possibilities of open loop control for physics studies and maybe for reactor performance control.

VL - 52 SN - 0029-5515 IS - 6 U1 - FP U2 - TP U5 - 5c85f5f5a81dc7fd9a55b30ff009f820 ER - TY - JOUR T1 - Overview of the ITER EC H&CD system and its capabilities JF - Fusion Engineering and Design Y1 - 2011 A1 - Omori, T. A1 - Henderson, M. A. A1 - Albajar, F. A1 - Alberti, S. A1 - Baruah, U. A1 - Bigelow, T. S. A1 - Becket, B. A1 - Bertizzolo, R. A1 - Bonicelli, T. A1 - Brusch, A. A1 - Caughman, J. B. A1 - Chavan, R. A1 - Cirant, S. A1 - Collazos, A. A1 - Cox, D. A1 - Darbos, C. A1 - M.R. de Baar A1 - Denisov, G. A1 - Farina, D. A1 - Gandini, F. A1 - Gassmann, T. A1 - Goodman, T. P. A1 - Heidinger, R. A1 - Hogge, J. P. A1 - Illy, S. A1 - Jean, O. A1 - Jin, J. A1 - Kajiwara, K. A1 - Kasparek, W. A1 - Kasugai, A. A1 - Kern, S. A1 - Kobayashi, N. A1 - Kumric, H. A1 - Landis, J. D. A1 - Moro, A. A1 - Nazare, C. A1 - Oda, Y. A1 - Pagonakis, I. A1 - Piosczyk, B. A1 - Platania, P. A1 - Plaum, B. A1 - Poli, E. A1 - Porte, L. A1 - Purohit, D. A1 - Ramponi, G. A1 - Rao, S. L. A1 - Rasmussen, D. A. A1 - Ronden, D. M. S. A1 - Rzesnicki, T. A1 - Saibene, G. A1 - Sakamoto, K. A1 - Sanchez, F. A1 - Scherer, T. A1 - Shapiro, M. A. A1 - Sozzi, C. A1 - Spaeh, P. A1 - Strauss, D. A1 - Sauter, O. A1 - Takahashi, K. A1 - Temkin, R. J. A1 - Thumm, M. A1 - Tran, M. Q. A1 - Udintsev, V.S. A1 - Zohm, H. KW - DESIGN KW - Electron Cyclotron KW - gyrotron KW - ITER KW - launcher KW - MHD stabilization AB -The Electron Cyclotron (EC) system for the ITER tokamak is designed to inject >= 20 MW RF power into the plasma for Heating and Current Drive (H&CD) applications. The EC system consists of up to 26 gyrotrons (between 1 and 2 MW each), the associated power supplies, 24 transmission lines and 5 launchers. The EC system has a diverse range of applications including central heating and current drive, current profile tailoring and control of plasma magneto-hydrodynamic (MUD) instabilities such as the sawtooth and neoclassical tearing modes (NTMs). This diverse range of applications requires the launchers to be capable of depositing the EC power across nearly the entire plasma cross section. This is achieved by two types of antennas: an equatorial port launcher (capable of injecting up to 20 MW from the plasma axis to mid-radius) and four upper port launchers providing access from inside of mid radius to near the plasma edge. The equatorial launcher design is optimized for central heating, current drive and profile tailoring, while the upper launcher should provide a very focused and peaked current density profile to control the plasma instabilities. The overall EC system has been modified during the past 3 years taking into account the issues identified in the ITER design review from 2007 and 2008 as well as integrating new technologies. This paper will review the principal objectives of the EC system, modifications made during the past 2 years and how the design is compliant with the principal objectives. (C) 2011 ITER Organization. Published by Elsevier B.V. All rights reserved.

VL - 86 SN - 0920-3796 IS - 6-8 N1 - ISI Document Delivery No.: 853KZTimes Cited: 1Cited Reference Count: 2526th Symposium on Fusion Technology (SOFT)SEP 27-OCT 01, 2010Porto, PORTUGALInst Plasmas Fusao Nucl (IPFN), Commiss European Union, Inst Soldadura Qualidade (ISQ), Fundacao Ciencia Tecnologia (FCT), Univ Tecnica Lisboa (UTL), TAP, Andante U1 -FP

U2 -TP

U5 - c370f03eff7f1a27a15a35be0d59bc06 ER - TY - JOUR T1 - Chapter 3: MHD stability, operational limits and disruptions JF - Nuclear Fusion Y1 - 2007 A1 - Hender, T. C. A1 - Wesley, J. C. A1 - Bialek, J. A1 - Bondeson, A. A1 - Boozer, A. H. A1 - Buttery, R. J. A1 - Garofalo, A. A1 - Goodman, T. P. A1 - Granetz, R. S. A1 - Gribov, Y. A1 - Gruber, O. A1 - Gryaznevich, M. A1 - Giruzzi, G. A1 - Gunter, S. A1 - Hayashi, N. A1 - Helander, P. A1 - Hegna, C. C. A1 - Howell, D. F. A1 - Humphreys, D. A. A1 - Huysmans, G. T. A. A1 - Hyatt, A. W. A1 - Isayama, A. A1 - Jardin, S. C. A1 - Kawano, Y. A1 - Kellman, A. A1 - Kessel, C. A1 - Koslowski, H. R. A1 - La Haye, R. J. A1 - Lazzaro, E. A1 - Liu, Y. Q. A1 - Lukash, V. A1 - Manickam, J. A1 - Medvedev, S. A1 - Mertens, V. A1 - Mirnov, S. V. A1 - Nakamura, Y. A1 - Navratil, G. A1 - Okabayashi, M. A1 - Ozeki, T. A1 - Paccagnella, R. A1 - Pautasso, G. A1 - Porcelli, F. A1 - Pustovitov, V. D. A1 - Riccardo, V. A1 - Sato, M. A1 - Sauter, O. A1 - Schaffer, M. J. A1 - Shimada, M. A1 - Sonato, P. A1 - Strait, E. J. A1 - Sugihara, M. A1 - Takechi, M. A1 - Turnbull, A. D. A1 - Westerhof, E. A1 - Whyte, D. G. A1 - Yoshino, R. A1 - Zohm, H. VL - 47 SN - 0029-5515 UR -