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Experimental Evidence for Electron Heat Transport Threshold in ASDEX Upgrade H-modes
BibTeX
@MISC{Manini_experimentalevidence,
author = {A Manini and F Ryter and C Angioni and M Apostoliceanu and A G Peeters and J Stober and G Tardini and F Leuterer and C F Maggi and D Nishijima and A Stäbler and W Suttrop and D Wagner and Upgrade Asdex and Team},
title = {Experimental Evidence for Electron Heat Transport Threshold in ASDEX Upgrade H-modes},
year = {}
}
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Abstract
Introduction and experimental conditions Electron temperature profiles in tokamak plasmas have been observed to weakly react to changes of the auxiliary heating power deposition profile. This property known as 'profile resilience' or 'profile stiffness', can be explained by an increase of transport in reaction to an increase of ∇T /T above a critical value. Recently, the electron heat transport has been investigated in several tokamaks, in particular using electron cyclotron heating (ECH). The experimental observations suggest that transport is likely to be governed by turbulence increasing above a threshold in 1/L Te = −∇T e /T e . A critical gradient length model has therefore been proposed, first in [1] then modified and applied in
