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Tests on a mock-up of the feedback controlled matching options for the ITER ICRH system

(2009) AIP Conference Proceedings. 1187. p.285-288
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Abstract
For the ICRH of ITER 20MW must be coupled to the plasma in the 40-55MHz frequency band via an array of 24 radiating shorted straps fed by four generators. The matching system must provide automatic matching control on the mean load provided by the plasma and be resilient (|Γ| < 0.2) to a wide range of fast antenna load excursions occurring in ELMy plasmas. Furthermore, good control of the current distribution in the strap array must be possible for the various heating and current drive scenarios. Two load resilient matching options have been considered for ITER: the 4 “Conjugate-T” (CT) and the 4 hybrids ones, the first being presently considered as a back-up option. Automatic control of these 2 options is presently developed, and tested for optimization on a low-powered scaled mock-up. Successful implementation of the simultaneous feedback control of 11 actuators for the matching of the 4CT and for the control of the toroidal phasing has already been achieved. The matching and the array current control of the 3dB hybrid option is provided by simultaneous feedback control of the decouplers and double stub tuners (in total 23 actuators) and is being progressively implemented. The simultaneous control of matching and antenna current has already been successfully tested on part of the array.
Keywords
ICRF, Load-resilience, ITER, Matching, Antenna, Hybrid, Conjugate-T

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Citation

Please use this url to cite or link to this publication:

Chicago
Grine, Djamel, Michel Vervier, André Messiaen, and Pierre Dumortier. 2009. “Tests on a Mock-up of the Feedback Controlled Matching Options for the ITER ICRH System.” In AIP Conference Proceedings, ed. Volodymyr Bobkov and Jean-Marie Noterdaeme, 1187:285–288. Melville, NY, USA: American Institute of Physics (AIP).
APA
Grine, D., Vervier, M., Messiaen, A., & Dumortier, P. (2009). Tests on a mock-up of the feedback controlled matching options for the ITER ICRH system. In Volodymyr Bobkov & J.-M. Noterdaeme (Eds.), AIP Conference Proceedings (Vol. 1187, pp. 285–288). Presented at the 18th Topical conference on Radio Frequency Power in Plasmas, Melville, NY, USA: American Institute of Physics (AIP).
Vancouver
1.
Grine D, Vervier M, Messiaen A, Dumortier P. Tests on a mock-up of the feedback controlled matching options for the ITER ICRH system. In: Bobkov V, Noterdaeme J-M, editors. AIP Conference Proceedings. Melville, NY, USA: American Institute of Physics (AIP); 2009. p. 285–8.
MLA
Grine, Djamel, Michel Vervier, André Messiaen, et al. “Tests on a Mock-up of the Feedback Controlled Matching Options for the ITER ICRH System.” AIP Conference Proceedings. Ed. Volodymyr Bobkov & Jean-Marie Noterdaeme. Vol. 1187. Melville, NY, USA: American Institute of Physics (AIP), 2009. 285–288. Print.
@inproceedings{1853371,
  abstract     = {For the ICRH of ITER 20MW must be coupled to the plasma in the 40-55MHz frequency band via an array of 24 radiating shorted straps fed by four generators. The matching system must provide automatic matching control on the mean load provided by the plasma and be resilient (|\ensuremath{\Gamma}| {\textlangle} 0.2) to a wide range of fast antenna load excursions occurring in ELMy plasmas. Furthermore, good control of the current distribution in the strap array must be possible for the various heating and current drive scenarios. Two load resilient matching options have been considered for ITER: the 4 {\textquotedblleft}Conjugate-T{\textquotedblright} (CT) and the 4 hybrids ones, the first being presently considered as a back-up option. Automatic control of these 2 options is presently developed, and tested for optimization on a low-powered scaled mock-up. Successful implementation of the simultaneous feedback control of 11 actuators for the matching of the 4CT and for the control of the toroidal phasing has already been achieved. The matching and the array current control of the 3dB hybrid option is provided by simultaneous feedback control of the decouplers and double stub tuners (in total 23 actuators) and is being progressively implemented. The simultaneous control of matching and antenna current has already been successfully tested on part of the array.},
  author       = {Grine, Djamel and Vervier, Michel and Messiaen, Andr{\'e} and Dumortier, Pierre},
  booktitle    = {AIP Conference Proceedings},
  editor       = {Bobkov, Volodymyr and Noterdaeme, Jean-Marie},
  isbn         = {9780735407534},
  issn         = {0094-243X},
  keyword      = {ICRF,Load-resilience,ITER,Matching,Antenna,Hybrid,Conjugate-T},
  language     = {eng},
  location     = {Ghent, Belgium},
  pages        = {285--288},
  publisher    = {American Institute of Physics (AIP)},
  title        = {Tests on a mock-up of the feedback controlled matching options for the ITER ICRH system},
  url          = {http://dx.doi.org/10.1063/1.3273749},
  volume       = {1187},
  year         = {2009},
}

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