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Transport Studies Using Perturbative Experiments

G. M. D. Hogeweij

Fusion Science and Technology

Volume 45 / Number 2T / March 2004 / Pages 315-320


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By inducing a small electron temperature perturbation in a plasma in steady state one can in principle determine the conductive and convective components of the electron heat ux, and the associated thermal diffusivity and convection velocity. The same can be done for other plasma parameters, like density or ion temperature.

In this paper experimental and analysis techniques are briey reviewed. The fundamental question whether the uxes are linear functions of the gradients or not is discussed. Experimental results are summarized, including so-called 'non-local' phenomena.

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