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

C. Giroud*, S. Jachmich, P. Jacquet, A. Jarvinen, E. Lerche, F. Rimini, L. Aho-Mantila, N. Aiba, I. Balboa, P. Belo, C. Angioni, M. Beurskens, S. Brezinsek, F. J. Casson, I. Coffey, G. Cunningham, E. Delabie, S. Devaux, P. Drewelow, L. FrassinettiA. Figueiredo, A. Huber, J. Hillesheim, L. Garzotti, M. Goniche, M. Groth, Hyun-Tae Kim, M. Leyland, P. Lomas, G. Maddison, S. Marsen, G. Matthews, A. Meigs, S. Menmuir, T. Puetterich, G. van Rooij, S. Saarelma, M. Stamp, H. Urano, A. Webster, JET EFDA Contributors

*Corresponding author for this work

Research output: Contribution to journalArticle

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Abstract

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.

Original languageEnglish
Article number035004
Number of pages20
JournalPlasma Physics and Controlled Fusion
Volume57
Issue number3
Early online date10 Feb 2015
DOIs
Publication statusPublished - Mar 2015

Bibliographical note

Part of Invited papers from the 41st European Physical Society Conference on Plasma Physics (Berlin, Germany, 23-27 June 2014)

Keywords

  • tokamak
  • high triangularity
  • seeding
  • power load
  • pedestal
  • confinement
  • ELMY H-MODE
  • ASDEX UPGRADE
  • CONFINEMENT
  • DENSITY
  • TRIANGULARITY
  • OPTIMIZATION
  • OPERATION
  • TRANSPORT
  • PEDESTAL
  • TOKAMAKS

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