Progress at JET in integrating ITER-relevant core and edge plasmas within the constraints of an ITER-like wall

C. Giroud (1) , S. Jachmich (2) , P. Jacquet (1) , A. Järvinen (3) , Ernesto Lerche (2) , F. Rimini (1) , L. Aho-Mantila (4) , N. Aiba , I. Balboa (1) , P. Belo (1) , C. Angioni (5) , M. Beurskens (1) , S. Brezinsek (6) , F. J. Casson (1) , I. Coffey (7) , G. Cunningham (1) , E. Delabie (8) , Stéphane Devaux (1) , P. Drewelow , L. Frassinetti (9) , António Figueiredo (10) , A. Huber (6) , J. Hillesheim (1) , L. Garzotti (1) , M. Goniche (11) , M. Groth (3) , Hyun-Tae Kim (1) , M. Leyland (12) , P. Lomas (1) , G. Maddison (1) , S. Marsen , G. Matthews (1) , A. Meigs (1) , S. Menmuir (9) , T. Puetterich (6) , G. Van Rooij (8) , S. Saarelma (1) , M. Stamp (1) , H. Urano , A. Webster (1) , Jet Efda Contributors (13)

1 EURATOM/CCFE Fusion Association
2 ERM KMS - Ecole Royale Militaire / Koninklijke Militaire School
3 Association EURATOM-TEKES
4 VTT - VTT Technical Research Centre of Finland
5 IPP - Max-Planck-Institut für Plasmaphysik [Garching]
6 Association Euratom-FZJ
7 ARC - Astrophysics Research Centre [Belfast]
8 DIFFER - Dutch Institute for Fundamental Energy Research [Nieuwegein]
9 Department of Physics [Stockholm]
10 IPFN - Instituto de Plasmas e Fusão Nuclear [Lisboa]
11 IRFM - Institut de Recherche sur la Fusion par confinement Magnétique
12 YPI - York Plasma Institute
13 JET-EFDA - Joint European Torus

This paper reports the progress made at JET-ILW on integrating the requirements of the reference ITER baseline scenario with normalized confinement factor of 1, at a normalized pressure of 1.8 together with partially detached divertor whilst maintaining these conditions over many energy confinement times. The 2.5 MA high triangularity ELMy H-modes are studied with two different divertor configurations with D-gas injection and nitrogen seeding. The power load reduction with N seeding is reported. The relationship between an increase in energy confinement and pedestal pressure with triangularity is investigated. The operational space of both plasma configurations is studied together with the ELM energy losses and stability of the pedestal of unseeded and seeded plasmas. The achievement of stationary plasma conditions over many energy confinement times is also reported.

Mots clés: tokamak; high triangularity; seeding; power load; pedestal; confinement

Domaines: Physique des plasmas [physics.plasm-ph]

C. Giroud, S. Jachmich, P. Jacquet, A. Järvinen, Ernesto Lerche, et al.. Progress at JET in integrating ITER-relevant core and edge plasmas within the constraints of an ITER-like wall. Plasma Physics and Controlled Fusion, 2015, 57 (3), ⟨10.1088/0741-3335/57/3/035004⟩. ⟨hal-01285759⟩