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FP7

Innovative diagnostics for ITER physics addressed in JET

Funded under: FP7-EURATOM

Abstract

In recent years, JET diagnostic capability has been significantly improved to widen the range of physical phenomena that can be studied and thus contribute to the understanding of some ITER relevant issues. The most significant results reported in this paper refer to the plasma wall interactions, the interplay between core and edge physics and fast particles. A synergy between new infrared cameras, visible cameras and spectroscopy diagnostics has allowed investigating a series of new aspects of the plasma wall interactions. The power loads on the plasma facing components of JET main chambers have been assessed at steady state and during transient events like ELMs and disruptions. Evidence of filaments in the edge region of the plasma has been collected with a new fast visible camera and high resolution Thomson scattering. The physics of detached plasmas and some new aspects of dust formation have also been devoted particular attention. The influence of the edge plasma on the core has been investigated with upgraded active spectroscopy, providing new information on momentum transport and the effects of impurity injection on ELMs and ITBs and their interdependence. Given the fact that JET is the only machine with a plasma volume big enough to confine the alphas, a coherent programme of diagnostic developments for the energetic particles has been undertaken. With upgraded ?-ray spectroscopy and a new scintillator probe, it is now possible to study both the redistribution and the losses of the fast particles in various plasma conditions.

Additional information

Authors: A MURARI, Associazione EURATOM-ENEA per la Fusione, Consorzio RFX, Padova (IT);A ALFIER, Associazione EURATOM-ENEA per la Fusione, Consorzio RFX, Padova (IT);R PASQUALOTTO, Associazione EURATOM-ENEA per la Fusione, Consorzio RFX, Padova (IT);T EDLINGTON, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);Y ANDREW, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);G ARNOUX, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);M BEURSKENS, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);P COAD, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);M KEMPENAARS, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);V KIPTILY, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);A MEIGS, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);A ALONSO, Asociación EURATOM-CIEMAT para Fusión, CIEMAT, Madrid (ES);C HIDALGO, Asociación EURATOM-CIEMAT para Fusión, CIEMAT, Madrid (ES);E GAUTHIER, Association Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);C GIROUD, Association Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);S HONG, Association Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);T LOARER, Association Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);C CROMBE, Department of Applied Physics, Ghent University, Gent (BE);T TALA, Association EURATOM-Tekes, Espoo (FI)
Bibliographic Reference: An article published in: Plasma Physics and Controlled Fusion 50 (2008), 12 pp
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://dx.doi.org/10.1088/0741-3335/50/12/124043
Record Number: 200910114 / Last updated on: 2009-01-23
Category: PUBLICATION
Original language: en
Available languages: en