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Recent progress on lower hybrid current drive and implications for ITER

J. Hillairet ; Annika Ekedahl (Institutionen för teknisk fysik, Nukleär teknik) ; M. Goniche ; Y. S. Bae ; J. Achard ; A. Armitano ; B. Beckett ; J. Belo ; G. Berger-By ; J. M. Bernard ; E. Corbel ; L. Delpech ; J. Decker ; R. Dumont ; D. Guilhem ; G. T. Hoang ; F. Kazarian ; H. J. Kim ; X. Litaudon ; R. Magne ; L. Marfisi ; P. Mollard ; W. Namkung ; Emelie Nilsson (Institutionen för teknisk fysik, Nukleär teknik) ; S. Park ; Y. Peysson ; M. Preynas ; P. K. Sharma ; M. Prou
Nuclear Fusion (0029-5515). Vol. 53 (2013), 7,
[Artikel, refereegranskad vetenskaplig]

The sustainment of steady-state plasmas in tokamaks requires efficient current drive systems. Lower hybrid current drive is currently the most efficient method to generate a continuous additional off-axis toroidal plasma current and to reduce the poloidal flux consumption during the plasma current ramp-up phase. The operation of the Tore Supra ITER-like lower hybrid (LH) launcher has demonstrated the capability to couple LH power at ITER-like power densities with very low reflected power during long pulses. In addition, the installation of eight 700 kW/CW klystrons at the LH transmitter has allowed increasing the total LH power in long-pulse scenarios. However, in order to achieve pure stationary LH-sustained plasmas, some R&D is needed to increase the reliability of all the systems and codes, from radio-frequency (RF) sources to plasma scenario prediction. The CEA/IRFM is addressing some of these issues by leading a R&D programme towards an ITER LH system and by the validation of an integrated LH modelling suite of codes. In 2011, the RF design of a mode converter was validated at a low power. A 500 kW/5 s RF window is currently under manufacture and will be tested at a high power in 2012 in collaboration with the National Fusion Research Institute. All of this work aims to reduce the operational risks associated with the ITER steady-state operations.



Denna post skapades 2013-08-23. Senast ändrad 2013-08-23.
CPL Pubid: 182059

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Nukleär teknik (2006-2015)

Ämnesområden

Kärnfysik

Chalmers infrastruktur