Transport Studies in Fusion Plasmas - Perturbative Experiments

TitleTransport Studies in Fusion Plasmas - Perturbative Experiments
Publication TypeJournal Article
Year of Publication1994
AuthorsN.JL Cardozo
JournalFusion Technology
Volume25
Number2T
Pagination158-163
Date PublishedMar
ISBN Number0748-1896
Abstract

By subjecting a plasma in steady state to small perturbations and measuring the response, it is possible to determine elements of the matrix of transport coefficients. Experimentally this is difficult, and results are mainly limited to tranpsport driven by the pressure and temperature gradients. Importantly, off-diagonal elements in the transport matrix appear to be important. This has also implications for the interpretation of the so called 'power balance' diffusivity, determined from the steady state fluxes and gradients. Experimental techniques, analysis techniques, basic formulas etc are briefly reviewed. Experimental results are summarized. The fundamental question whether the fluxes are linear functions of die gradients or not is discussed.

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