Measurement of the open loop plasma equilibrium response in TCV

A. Coutlis, I. Bandyopadhyay, J. B. Lister, P. Vyas, R. Albanese, D. J.N. Limebeer, F. Villone, J. P. Wainwright

Research output: Contribution to journalArticlepeer-review

56 Citations (Scopus)


A near technique and results are presented for the estimation of the open loop frequency response of the plasma on TCV. Voltages were applied to poloidal field coils and the resulting plasma current, position and shape related parameters were measured. The results are compared with the CREATE-L model, and good agreement is confirmed. The results are a significant advance on previous comparisons with closed loop data, which were limited by the role of feedback in the system. A simpler circuit equation model has also been developed in order to understand the reasons for the good agreement and identify which plasma properties are important in determining the response. The reasons for the good agreement with this model are discussed. An alternative modelling methods has been developed, combining features of both the theoretical and experimental techniques. Its advantage is that it incorporates well defined knowledge of the electromagnetic properties of the tokamak with experimental data to derive plasma related parameters. This new model provides further insight into the plasma behaviour.

Original languageEnglish
Pages (from-to)663-683
Number of pages21
JournalNuclear Fusion
Issue number5
Publication statusPublished - May 1999
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Condensed Matter Physics


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