Interpretative transport modeling of the WEST boundary plasma: main plasma and light impurities
- 17 September 2020
- journal article
- research article
- Published by IOP Publishing in Nuclear Fusion
- Vol. 60 (12), 126048
- https://doi.org/10.1088/1741-4326/abb95b
Abstract
Understanding impurity transport in tokamak plasmas is crucial to control radiative losses and material migration in future magnetic fusion reactors. In this work we deploy the SolEdge2D-EIRENE code to model the boundary plasma in a WEST discharge, satisfactorily reproducing measurements of both upstream and divertor plasma conditions. The spatial distribution of oxygen, studied here as a representative light impurity, is compared to vacuum ultraviolet spectroscopy measurements acquired with an oscillating line of sight. The simulation captures a key feature of the experiment, namely a factor of ' 2 higher oxygen brightness in the inner divertor region compared to the outer one. This spatial asymmetry in oxygen concentration is interpreted by analyzing the balance of friction forces and thermal gradient forces that the light impurity exchanges with the main plasma.Keywords
Funding Information
- H2020 Euratom (633053)
This publication has 21 references indexed in Scilit:
- Validation of equilibrium tools on the COMPASS tokamakFusion Engineering and Design, 2015
- Numerical modelling for divertor design of the WEST device with a focus on plasma–wall interactionsNuclear Fusion, 2015
- 2D interpolation and extrapolation of discrete magnetic measurements with toroidal harmonics for equilibrium reconstruction in a tokamakPlasma Physics and Controlled Fusion, 2014
- The WEST project: Testing ITER divertor high heat flux component technology in a steady state tokamak environmentFusion Engineering and Design, 2014
- Fast sweeping reflectometry upgrade on Tore SupraReview of Scientific Instruments, 2010
- Plasma-wall interaction and plasma behaviour in the non-boronised all tungsten ASDEX UpgradeJournal of Nuclear Materials, 2009
- Simulation of ASDEX Upgrade Ohmic plasmas for SOLPS code validationNuclear Fusion, 2008
- Evidence for a poloidally localized enhancement of radial transport in the scrape-off layer of the Tore Supra tokamakJournal of Nuclear Materials, 2007
- Key issues in plasma–wall interactions for ITER: a European approachPlasma Physics and Controlled Fusion, 2003
- High-resolution duo-multichannel soft x-ray spectrometer for tokamak plasma diagnosticsReview of Scientific Instruments, 1987