Paleoclassical transport explains electron transport barriers in RTP and TEXTOR

TitlePaleoclassical transport explains electron transport barriers in RTP and TEXTOR
Publication TypeJournal Article
Year of Publication2008
AuthorsG.MD Hogeweij, J.D. Callen
JournalPlasma Physics and Controlled Fusion
Volume50
Number6
Pagination17
Date PublishedJun
Type of ArticleArticle
ISBN Number0741-3335
Accession NumberISI:000256544000012
KeywordsCONFINEMENT, diagnostics, MAGNETIC SHEAR, MODEL, PLASMAS, RATIONAL SURFACES, RIJNHUIZEN TOKAMAK PROJECT, SIMULATIONS, STELLARATOR, THERMAL TRANSPORT
Abstract

The recently developed paleoclassical transport model sets the minimum level of electron thermal transport in a tokamak. This transport level has proven to be in good agreement with experimental observations in many cases when fluctuation-induced anomalous transport is small, i.e. in (near-) ohmic plasmas in small to medium size tokamaks, inside internal transport barriers (ITBs) or edge transport barriers (H-mode pedestal). In this paper predictions of the paleoclassical transport model are compared in detail with data from such kinds of discharges: ohmic discharges from the RTP tokamak, EC heated RTP discharges featuring both dynamic and shot-to-shot scans of the ECH power deposition radius and off-axis EC heated discharges from the TEXTOR tokamak. For ohmically heated RTP discharges the T-e profiles predicted by the paleoclassical model are in reasonable agreement with the experimental observations, and various parametric dependences are captured satisfactorily. The electron thermal ITBs observed in steady state EC heated RTP discharges and transiently after switch-off of off-axis ECH in TEXTOR are predicted very well by the paleoclassical model.

URL<Go to ISI>://000256544000012
Division

Fusion Physics

PID

4f540e0a9765ebc5461ac9f77e60ca9f

Alternate TitlePlasma Phys. Control. Fusion

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