Dynamics and stability of divertor detachment in H-mode plasmas on JET

A. R. Field, I Balboa, P Drewelow, J Flanagan, C Guillemaut, J R Harrison, A Huber, V Huber, Bruce Lipschultz, G. Matthews, A. G. Meigs, Juergen Schmitz, M F Stamp, N. Walkden , JET contributors

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The dynamics and stability of divertor detachment in N2 seeded, type-I, ELMy H-mode plasmas with dominant NBI heating in the JET ITER-like wall device is studied by means of an integrated analysis of diagnostic data from several systems, classifying data relative to the ELM times. It is thereby possible to study the response of the detachment evolution to the control parameters (SOL input power, upstream density and impurity fraction) prevailing during the inter-ELM periods and the effect of ELMs on the detached divertor. A relatively comprehensive overview is achieved, including the interaction with the targets at various stages of the ELM cycle, the role of ELMs in affecting the detachment process and the overall performance of the scenario. The results are consistent with previous studies in devices with an ITER-like, metal wall, with the important advance of distinguishing data from intra- and inter-ELM periods. Operation without significant degradation of the core confinement
Original languageEnglish
Article number095003
Number of pages37
JournalPlasma Physics and Controlled Fusion
Issue number9
Publication statusPublished - 5 Jul 2017

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© 2017 CCFE. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details


  • H-MODE
  • detachment
  • stability
  • ELM

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