|Title||Experimental studies of electron transport|
|Publication Type||Journal Article|
|Year of Publication||2001|
|Authors||F. Ryter, C. Angioni, M. Beurskens, S. Cirant, G.T Hoang, G.MD Hogeweij, F. Imbeaux, A. Jacchia, P. Mantica, W. Suttrop, G. Tardini|
|Journal||Plasma Physics and Controlled Fusion|
Electron transport in tokamaks has many different features which are briefly reviewed. The paper is focused on electron heat transport in conventional tokamak plasmas. An inter-machine comparison indicates that the non-dimensional gradient length of the electron temperature profiles R/L-Te, is almost independent of the devices and varies little with plasma parameters. This strongly suggests that electron heat transport is governed by turbulence with a threshold in R/L-Te.. This is confirmed by modulation experiments using electron cyclotron heating. Simulations with empirical and physics-based transport models confirm this assumption.
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