Overview on Experiments On ITER-like Antenna On JET And ICRF Antenna Design For ITER

Journal Article · Thu Nov 26 00:00:00 EST 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3273731· OSTI ID:21335708

Nightingale, M P. S.; Blackman, T; Edwards, D; Fanthome, J; Graham, M; Hamlyn-Harris, C; Hancock, D; Jacquet, P; Mayoral, M -L; Monakhov, I; Nicholls, K; Stork, D; Whitehurst, A; Wilson, D; Wooldridge, E ^[1]; Durodie, F; Dumortier, P; Huygen, S; Koch, R; Lerche, E ^[2]

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1. EURATOM/UKAEA Fusion Association, Culham Science Centre, Abingdon, Oxon, OX14 3DB (United Kingdom)
2. Laboratory for Plasma Physics, Ecole Royale Militaire/Koninklijke Militaire School, Association Euratom-Belgian State, Avenue de la Renaissance 30, B-1000 Brussels (Belgium)

Following an overview of the ITER Ion Cyclotron Resonance Frequency (ICRF) system, the JET ITER-like antenna (ILA) will be described. The ILA was designed to test the following ITER issues: (a) reliable operation at power densities of order 8 MW/m{sup 2} at voltages up to 45 kV using a close-packed array of straps; (b) powering through ELMs using an internal (in-vacuum) conjugate-T junction; (c) protection from arcing in a conjugate-T configuration, using both existing and novel systems; and (d) resilience to disruption forces. ITER-relevant results have been achieved: operation at high coupled power density; control of the antenna matching elements in the presence of high inter-strap coupling, use of four conjugate-T systems (as would be used in ITER, should a conjugate-T approach be used); operation with RF voltages on the antenna structures up to 42 kV; achievement of ELM tolerance with a conjugate-T configuration by operating at 3{omega} real impedance at the conjugate-T point; and validation of arc detection systems on conjugate-T configurations in ELMy H-mode plasmas. The impact of these results on the predicted performance and design of the ITER antenna will be reviewed. In particular, the implications of the RF coupling measured on JET will be discussed.

• OSTI ID: 21335708
• Journal Information: AIP Conference Proceedings, Vol. 1187, Issue 1; Conference: 18. topical conference on radio frequency power in plasmas, Gent (Belgium), 24-26 Jun 2009; Other Information: DOI: 10.1063/1.3273731; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ANTENNAS
COUPLING
DESIGN
EDGE LOCALIZED MODES
ELECTRIC POTENTIAL
H-MODE PLASMA CONFINEMENT
ICR HEATING
IMPEDANCE
ITER TOKAMAK
JET TOKAMAK
MAGNETIC FIELD CONFIGURATIONS
OPERATION
PERFORMANCE
PLASMA
PLASMA DIAGNOSTICS
POWER DENSITY