Study of the effects of corrugated wall structures due to blanket modules around ICRH antennas

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Résumé

In future fusion reactors, and in ITER, the first wall will be covered by blanket modules. These blanket modules, whose dimensions are of the order of the ICRF wavelengths, together with the clearance gaps between them will constitute a corrugated structure which will interact with the electromagnetic waves launched by ICRF antennas. The conditions in which the grooves constituted by the clearance gaps between the blanket modules can become resonant are studied. Simple analytical models and numerical simulations show that mushroom type structures (with larger gaps at the back than at the front) can bring down the resonance frequencies, which could lead to large voltages in the gaps between the blanket modules and perturb the RF properties of the antenna if they are in the ICRF operating range. The effect on the wave propagation along the wall structure, which is acting as a spatially periodic (toroidally and poloidally) corrugated structure, and hence constitutes a slow wave structure modifying the wall boundary condition, is examined.

langue originaleAnglais
titreRadiofrequency Power in Plasmas - Proceedings of the 20th Topical Conference
EditeurAmerican Institute of Physics Inc.
Pages358-361
Nombre de pages4
ISBN (imprimé)9780735412101
Les DOIs
étatPublié - 2014
Evénement20th Topical Conference on Radiofrequency Power in Plasmas - Sorrento, Italie
Durée: 25 juin 201328 juin 2013

Série de publications

NomAIP Conference Proceedings
Volume1580
ISSN (imprimé)0094-243X
ISSN (Electronique)1551-7616

Une conférence

Une conférence20th Topical Conference on Radiofrequency Power in Plasmas
Pays/TerritoireItalie
La villeSorrento
période25/06/1328/06/13

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