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Abstract

Fusion reaction depends strongly on the ion temperature. Thus, it is important to choose an auxiliary heating scenario providing an efficient ion heating. Using the Ion Cyclotron Resonance Heating (ICRH) in minority scheme is one of potential candidates for such heating in fusion reactors. Significant fraction of ion heating has been demonstrated in many tokamak experiments (CMOD1, JET2, Tore Supra3) by optimizing the concentration of minority ion concentration. Previous H-minority heating experiments in Tore Supra indicated that the bulk ion and electron heating are very close to each other for high concentration (nH/ne approximately ?6%), whereas the electron heating dominates strongly for the low concentration case (nH/ne approximately 2.5%). Furthermore, the high minority concentration discharges exhibited a good energy confinement with strong toroidal rotation in co-current direction4.
This work reports the recent experiments performed in Tore Supra (CIEL configuration), with injected ICRH power of up to 8MW, at Ip = 0.8 - 1.2MA and ne(0) = 5 - 7X10E19m{-3} corresponding to a Greenwald fraction of up to 0.8. Furthermore, an analysis of the microstability performed with the linear electrostatic gyrokinetic code KINEZERO5 is presented.

Additional information

Authors: FENZI-BONIZEC C, Departement de Recherches sur la Fusion Controlee, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);BOURDELLE C, Departement de Recherches sur la Fusion Controlee, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);HOANG G T, Departement de Recherches sur la Fusion Controlee, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);ARTAUD J F, Departement de Recherches sur la Fusion Controlee, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);ASSAS S, Departement de Recherches sur la Fusion Controlee, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);BASIUK V, Departement de Recherches sur la Fusion Controlee, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);ERIKSSON L-G, Departement de Recherches sur la Fusion Controlee, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: An oral paper given at: 31st EPS Conference on Controlled Fusion and Plasma Physics Organised by: CCLRC Rutherford Appleton Laboratory (GB); EURATOM/UKAEA Fusion Association (GB); Imperial College London Held at: Imperial College London (
Availability: Available from Association EURATOM-CEA, Departement de Recherches sur la Fusion Controlee, CEA Cadarache, F-13108 St Paul-Lez-Durance, France Tel: (+33) 4 42 25 70 01; Fax: (+33) 4 42 25 64 21 E-mail: dirdrfc@drfc.cad.cea.fr
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