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Abstract

A comparative analysis of the spatial and temporal characteristics of transient energy loads (ELMs and disruptions) on plasma facing components (PFCs) in present tokamak devices and their extrapolation to next step devices is presented. Type I ELMs lead to the expulsion of energy by the plasma in helical structures with ballooning-like features and toroidal numbers in the range n = 10�15. The plasma energy is transported towards the divertor and the main chamber PFCs leading to significant transient energy loads at these two locations on small wetted area. The largest transient energy fluxes onto PFCs in tokamaks are measured during the thermal quench of disruptions. These fluxes do not exceed greatly those of large Type I ELMs, due to the much larger wetted area for energy flux during the thermal quench compared to Type I ELMs. The implications of these findings for the next step devices are discussed.

Additional information

Authors: ANDREW P, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);FUNDAMENSKI W, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);KIRK A, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);MATTHEWS G F, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);RICCARDO V, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);ASAKURA N, Naka Fusion Research Establishment, JAERI (JP);BOEDO J A, University of California, San Diego (US);FENSTERMACHER M E, Lawrence Livermore National Laboratory, Livermore (US);LEONARD A W, General Atomics, San Diego (US);LOARTE A, EFDA Close Support Unit, Garching (DE);EICH T, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE);HERRMANN A, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE);PAUTASSO G, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE);FUCHS J C, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE);GRUBER O, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE);NEUHAUSER J, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE);CORRE Y, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);GAUTHIER E, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);FEDERICI G, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE);GONCALVES B, Associacao EURATOM-IST, Centro de Fusão Nuclear, Instituto Superior Técnico, Lisbon (PT);SILVA C, Associacao EURATOM-IST, Centro de Fusão Nuclear, Instituto Superior Técnico, Lisbon (PT);PITTS R A, Centre de Recherches en Physique des Plasmas, Association EURATOM-Confédération Suisse, Ecole Polytechnique Fédérale de Lausanne (CH)
Bibliographic Reference: An article published in: Journal of Nuclear Materials 337-339 (2005) 669-676
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://probe.usp.br/cgi-bin/sciserv.pl?collection=journals&journal=00223115
Record Number: 200518090 / Last updated on: 2005-04-19
Category: PUBLICATION
Original language: en
Available languages: en