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FP7

Estimated RF sheath power fluxes on ITER plasma facing components

Funded under: FP7-EURATOM

Abstract

Using numerical simulation, a first estimate is made of power fluxes caused by radio-frequency sheaths on plasma facing components surrounding the ITER Ion Cyclotron Range of Frequencies wave launcher. Three toroidal strap phasings were considered, and four plasma scenarios covering a broad range of Scrape-Off Layer densities. Parallel heat fluxes up to ~16 MW/ m{2} are obtained, localized in poloidal peaks whose radial extension (initially 4-35 mm) increases when nearby flux tubes are coupled by exchanging RF currents. Quantitative results strongly depend on the local density, both via the unperturbed input profiles and via subsequent RF-induced modifications by E × B(0) convection. Sources of uncertainty and aspects requiring further validation are identified.

Additional information

Authors: COLAS L, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);GONICHE M, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);MILANESIO D, Dipartimento di Elettronica, Torino (IT);FAUDOT E, LPMIA, Vand�uvre (FR);LOARTE A, ITER Organization, Fusion Science and Technology Department Cadarache, St. Paul-lez-Durance (FR)
Bibliographic Reference: An oral paper given at: 18th International Conference on Plasma-Surface Interactions in Controlled Fusion Device Organised by: Laboratorio Nacional de Fusión Held in: Toledo (ES)
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://dx.doi.org/doi:10.1016/j.jnucmat.2009.01.248
Record Number: 200910342 / Last updated on: 2009-09-22
Category: PUBLICATION
Original language: en
Available languages: en