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Abstract

Gamma-ray images of fast D- and (4)He-ions accelerated with third-harmonic ion-cyclotron-resonance heating of (4)He-beam were simultaneously recorded for the first time in JET tokamak experiments dedicated to the investigation of burning plasmas with 3.5MeV fusion alpha particles. Gamma rays, born as a result of nuclear reactions, (9)Be((4)He, n Gamma )(12)C and (12)C(D, p Gamma )(13)C, between the fast ions and the main plasma impurities, are measured using a two-dimensional multicollimator spectrometer array, which distinguishes the Gamma-rays from accelerated D- and (4)He-ions. Tomographic reconstruction of the Gamma -ray emission profiles gives images of the fast-ion population in the poloidal cross-section. The potential of this technique to visualize several energetic ion species and to determine their behaviour in different plasma scenarios is demonstrated.

Additional information

Authors: KIPTILY V G, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);ADAMS J M, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);SHARAPOV S E, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);ALPER B, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);BARNSLEY R, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);DE VRIES P, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);GOWERS C, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);LOMAS P J, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);MEIGS A, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);MURARI A, Associazione Euratom-ENEA sulla Fusione, Consorzio RFX, Padova (IT);YAVORSKIJ V, Euratom/OEAW Association, Institute for Theoretical Physics, University of Innsbruck(AT);MANTSINEN M J, Association EURATOM-TEKES, Helsinki University of Technology (FI);NOTERDAEME J-M, Association EURATOM-TEKES, Helsinki University of Technology (FI);BERTALOT L, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);ORSITTO F P, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);ERIKSSON L-G, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: An article published in: Nuclear Fusion 45 (2005) L21�L25
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: doi:10.1088/0029-5515/45/5/L01
Record Number: 200518133 / Last updated on: 2005-06-06
Category: PUBLICATION
Original language: en
Available languages: en