Interpretative and predictive modelling of Joint European Torus collisionality scans

Frida Eriksson, Emil Fransson, Michael Oberparleiter, Henrik Nordman, P. Strand, A. Salmi, T. Tala

Research output: Contribution to journalArticleScientificpeer-review

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×B 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.
Original languageEnglish
Article number115004
JournalPlasma Physics and Controlled Fusion
Volume61
Issue number11
DOIs
Publication statusPublished - 23 Sep 2019
MoE publication typeA1 Journal article-refereed

Fingerprint

Joint European Torus
beam injection
Magnetoelectric effects
Plasmas
neutral beams
Geometry
simulation
Experiments
Temperature
electromagnetism
shear
scaling
collisions
geometry

Keywords

  • gyro-fluid
  • ITG
  • modelling
  • particle transport
  • turbulence

Cite this

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title = "Interpretative and predictive modelling of Joint European Torus collisionality scans",
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×B 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.",
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Interpretative and predictive modelling of Joint European Torus collisionality scans. / Eriksson, Frida; Fransson, Emil; Oberparleiter, Michael; Nordman, Henrik; Strand, P.; Salmi, A.; Tala, T.

In: Plasma Physics and Controlled Fusion, Vol. 61, No. 11, 115004, 23.09.2019.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Fransson, Emil

AU - Oberparleiter, Michael

AU - Nordman, Henrik

AU - Strand, P.

AU - Salmi, A.

AU - Tala, T.

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AB - 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×B 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.

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