Archivio Istituzionale della RicercaFollowing 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/m2 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 3Ω 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.
Overview on Experiments On ITER‐like Antenna On JET And ICRF Antenna Design For ITER / Nightingale, M. P. S.; Durodié, F.; Argouarch, A.; Beaumont, B.; Becoulet, A.; Bernard, J. M.; Blackman, T.; Caughman, J.; Dumortier, P.; Edwards, D.; Fanthome, J.; Gassman, T.; Goulding, R.; Graham, M.; Hamlyn Harris, C.; Hancock, D.; Huygen, S.; Jacquet, P.; Kazarian, F.; Koch, R.; Lamalle, P. U.; Lerche, E.; Louche, F.; Maggiora, Riccardo; Mayoral, M. L.; Messiaen, A. M.; Milanesio, Daniele; Monakhov, I.; Mukherjee, A.; Nicholls, K.; Noterdaeme, J. M.; Ongena, J.; Rasmussen, D.; Rimini, F.; Sartori, R.; Stork, D.; Van Eester, D.; Vervier, M.; Vrancken, M.; Vulliez, K.; Whitehurst, A.; Wilson, D.; Wooldridge, E.. - In: AIP CONFERENCE PROCEEDINGS. - ISSN 0094-243X. - STAMPA. - 1187:(2009), pp. 213-220. (Intervento presentato al convegno 18th Topical Conference on Radio Frequency Power in Plasmas tenutosi a Ghent, Belgium nel 24-26 June 2009) [10.1063/1.3273731].
Overview on Experiments On ITER‐like Antenna On JET And ICRF Antenna Design For ITER
MAGGIORA, Riccardo;MILANESIO, DANIELE;
2009
Abstract
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/m2 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 3Ω 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.
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
https://hdl.handle.net/11583/2498584
Attenzione
Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo