Recent progress on lower hybrid current drive and implications for ITER
Artikel i vetenskaplig tidskrift, 2013
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.
Författare
J. Hillairet
Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)
Annika Ekedahl
Chalmers, Teknisk fysik, Nukleär teknik
M. Goniche
Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)
Y. S. Bae
National Fusion Research Institute
J. Achard
Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)
A. Armitano
Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)
B. Beckett
ITER Organization
J. Belo
Instituto Superior Tecnico
G. Berger-By
Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)
J. M. Bernard
Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)
E. Corbel
Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)
L. Delpech
Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)
J. Decker
Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)
R. J. Dumont
Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)
D. Guilhem
Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)
G. T. Hoang
Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)
F. Kazarian
ITER Organization
H. J. Kim
National Fusion Research Institute
X. Litaudon
Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)
R. Magne
Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)
L. Marfisi
Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)
P. Mollard
Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)
W. Namkung
Pohang University of Science and Technology
Emelie Nilsson
Chalmers, Teknisk fysik, Nukleär teknik
S. Park
National Fusion Research Institute
Y. Peysson
Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)
M. Preynas
Max-Planck-Gesellschaft
P. K. Sharma
Institute for Plasma Research India
M. Prou
Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)
Nuclear Fusion
0029-5515 (ISSN) 1741-4326 (eISSN)
Vol. 53 7 073004Ämneskategorier
Subatomär fysik
DOI
10.1088/0029-5515/53/7/073004