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   Articles with "impurity transport" as a keyword



A GPU‐Accelerated 3D Unstructured Mesh Based Particle Tracking Code for Multi‐Species Impurity Transport Simulation in Fusion Tokamaks

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recommendations! Published in 2025 at "Contributions to Plasma Physics"

DOI: 10.1002/ctpp.202400073

Abstract: This paper presents the multi‐species global impurity transport capability developed in a GPU‐accelerated fully 3D unstructured mesh‐based code, GITRm, to simultaneously track multiple impurity species and handle interactions of these impurities with mixed‐material surfaces. Different… read more here.

Keywords: mesh based; gpu accelerated; unstructured mesh; multi species ... See more keywords

Effects of collisions on impurity transport driven by electrostatic modes

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recommendations! Published in 2020 at "Journal of Plasma Physics"

DOI: 10.1017/s0022377820000537

Abstract: The turbulence-induced quasi-linear particle flux of a highly charged, collisional impurity species is calculated from the electrostatic gyrokinetic equation including collisions with the bulk ions and the impurities themselves. The equation is solved by an… read more here.

Keywords: impurity transport; collisions impurity; effects collisions; driven electrostatic ... See more keywords
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Overview of core impurity transport in the first divertor operation of Wendelstein 7-X

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recommendations! Published in 2023 at "Journal of Plasma Physics"

DOI: 10.1017/s0022377823000417

Abstract: The impurity transport at Wendelstein 7-X during its most recent campaign is characterized and documented for a variety of different plasma scenarios. An overview of its dependence on several quantities is given, which allows identification… read more here.

Keywords: impurity transport; transport first; core impurity; overview core ... See more keywords
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Numerical estimation of the oxygen impurity transport in the Aditya tokamak

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recommendations! Published in 2020 at "Physics of Plasmas"

DOI: 10.1063/1.5115230

Abstract: The present study illustrates an approach to solving the one-dimensional impurity transport equation in tokamak plasma, without the loss of generality, using a semi-implicit numerical method. The radial profiles of number density distribution of different… read more here.

Keywords: aditya tokamak; impurity transport; transport; number density ... See more keywords
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Argon, neon, and nitrogen impurity transport in the edge and SOL regions of a tokamak

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recommendations! Published in 2023 at "Physics of Plasmas"

DOI: 10.1063/5.0142975

Abstract: Numerical simulations of the interchange plasma turbulence in the presence of medium-Z impurities (N2, Ne, and Ar) seeding have been performed using BOUT++. These simulation results are used to study the impurity transport mechanism in… read more here.

Keywords: impurity transport; sol regions; impurity; transport ... See more keywords

Modification of argon impurity transport by electron cyclotron heating in KSTAR H-mode plasmas

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recommendations! Published in 2017 at "Nuclear Fusion"

DOI: 10.1088/1741-4326/aa5333

Abstract: Experiments with a small amount of Ar gas injection as a trace impurity were conducted in the Korea Superconducting Tokamak Advanced Research (KSTAR) H-mode plasma (BT  = 2.8 T, IP = 0.6 MA, and PNBI =… read more here.

Keywords: electron cyclotron; impurity transport; transport; kstar mode ... See more keywords

Global modelling of tungsten impurity transport based on the drift-kinetic equation

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recommendations! Published in 2019 at "Nuclear Fusion"

DOI: 10.1088/1741-4326/ab5462

Abstract: A global kinetic simulation model of collisional impurity transport is developed for evaluating the radial particle flux of tungsten impurity in the edge region of a tokamak plasma. Here, the plasma including the impurity and… read more here.

Keywords: drift kinetic; impurity transport; impurity; kinetic equation ... See more keywords

Impact of main ion pressure anisotropy on stellarator impurity transport

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recommendations! Published in 2019 at "Nuclear Fusion"

DOI: 10.1088/1741-4326/ab581f

Abstract: Main ions influence impurity dynamics through a variety of mechanisms; in particular, via impurity-ion collisions. To lowest order in an expansion in the main ion mass over the impurity mass, the impurity-ion collision operator only… read more here.

Keywords: impurity transport; impurity; main ion; pressure anisotropy ... See more keywords

Validation of low-Z impurity transport theory using boron perturbation experiments at ASDEX upgrade

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recommendations! Published in 2021 at "Nuclear Fusion"

DOI: 10.1088/1741-4326/ac3cd9

Abstract: An experimental technique has been developed at ASDEX upgrade (AUG) to separately identify the diffusive and convective components of the boron particle flux. Using this technique a database of B transport coefficients has been assembled… read more here.

Keywords: asdex upgrade; impurity transport; impurity; diffusion ... See more keywords

Full-radius integrated modelling of ASDEX Upgrade L-modes including impurity transport and radiation

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recommendations! Published in 2024 at "Nuclear Fusion"

DOI: 10.1088/1741-4326/ad29bd

Abstract: An integrated framework that demonstrates multi-species, multi-channel modelling capabilities for the prediction of impurity density profiles and their feedback on the main plasma through radiative cooling and fuel dilution is presented. It combines all presently… read more here.

Keywords: radiation; full radius; impurity; asdex upgrade ... See more keywords

Effect of toroidal rotation on impurity transport in tokamak improved confinement

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recommendations! Published in 2024 at "Nuclear Fusion"

DOI: 10.1088/1741-4326/ad3470

Abstract: The centrifugal force effects from toroidal rotation in improved confinement plasmas are analyzed on high-Z impurities in tokamaks. Tungsten (W) transport simulations are performed using the impurity transport code developed in the integrated code TASK.… read more here.

Keywords: transport; effect; toroidal rotation; impurity ... See more keywords