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Title: Studies of local electron heat transport on TFTR

The anomalously fast relaxation of the perturbations to the electron temperature profile caused by a sawtooth crash has been studied extensively on TFTR. We will show that on a short timescale the heat pulse is not simply diffusive as has been generally assumed, but that modeling of the heat pulse requires a transient enhancement in {chi}{sub e} following the sawtooth crash. It will be shown that the time-dependent enhancement in {chi}{sub e} predicted by non-linear thermal transport models, i.e., incremental {chi} models or the Rebut-Lallia-Watkins transport model, is much smaller than that required to explain the anomalies in the heat pulse propagation.
Authors:
; ; ; ; ;
Publication Date:
OSTI Identifier:
10183507
Report Number(s):
PPPL--2898
ON: DE93040429; TRN: 93:020125
DOE Contract Number:
AC02-76CH03073
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 16 Aug 1993
Research Org:
Princeton Univ., NJ (United States). Plasma Physics Lab.
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; TFTR TOKAMAK; CHARGED-PARTICLE TRANSPORT; HEAT TRANSFER; ELECTRON TEMPERATURE; SAWTOOTH OSCILLATIONS; HEAT FLUX; THERMAL DIFFUSION 700330; PLASMA KINETICS, TRANSPORT, AND IMPURITIES