Interpretative and predictive modelling of Joint European Torus collisionality scans

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JET Contributors , Eriksson , F , Fransson , E , Oberparleiter , M , Nordman , H , Strand , P , Salmi , A , Tala , T & Ahlgren , T 2019 , ' Interpretative and predictive modelling of Joint European Torus collisionality scans ' , Plasma Physics and Controlled Fusion , vol. 61 , no. 11 , 115004 . https://doi.org/10.1088/1361-6587/ab2f45

Title: Interpretative and predictive modelling of Joint European Torus collisionality scans
Author: JET Contributors; Eriksson, F.; Fransson, E.; Oberparleiter, M.; Nordman, H.; Strand, P.; Salmi, A.; Tala, T.; Ahlgren, T.
Other contributor: University of Helsinki, Department of Physics

Date: 2019-11
Language: eng
Number of pages: 12
Belongs to series: Plasma Physics and Controlled Fusion
ISSN: 0741-3335
DOI: https://doi.org/10.1088/1361-6587/ab2f45
URI: http://hdl.handle.net/10138/312076
Abstract: Transport modelling of Joint European Torus (JET) dimensionless collisionality scaling experiments in various operational scenarios is presented. Interpretative simulations at a fixed radial position are combined with predictive JETTO simulations of temperatures and densities, using the TGLF transport model. The model includes electromagnetic effects and collisions as well as (E)over-right-arrow x (b)over-right-arrow shear in Miller geometry. Focus is on particle transport and the role of the neutral beam injection (NBI) particle source for the density peaking. The experimental 3-point collisionality scans include L-mode, and H-mode (D and H and higher beta D plasma) plasmas in a total of 12 discharges. Experimental results presented in (Tala et al 2017 44th EPS Conf.) indicate that for the H-mode scans, the NBI particle source plays an important role for the density peaking, whereas for the L-mode scan, the influence of the particle source is small. In general, both the interpretative and predictive transport simulations support the experimental conclusions on the role of the NBI particle source for the 12 JET discharges.
Subject: turbulence
ITG
gyro-fluid
modelling
particle transport
DENSITY PROFILE
TRANSPORT
PEAKING
FLUX
114 Physical sciences
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