Results 11 to 20 of about 2,872,515 (340)
Impurity transport in tokamak plasmas, theory, modelling and comparison with experiments
Plasma Physics and Controlled Fusion, 2021 In this paper, the theory of collisional and turbulent transport of impurities in tokamak plasmas is reviewed. The results are presented with the aim of providing at the same time a historical reconstruction of the scientific progress and a complete ...
C. Angioni
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Inference of experimental radial impurity transport on Alcator C-Mod: Bayesian parameter estimation and model selection [PDF]
Nuclear Fusion, 2020 We present a fully Bayesian approach for the inference of radial profiles of impurity transport coefficients and compare its results to neoclassical, gyrofluid and gyrokinetic modeling.
F. Sciortino +10 more
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Analytical model for collisional impurity transport in tokamaks at arbitrary collisionality
Plasma Physics and Controlled Fusion, 2022 The physics governing the collisional transport of impurities in tokamak plasmas can change significantly depending on four main parameters, namely the collisionality, the impurity charge and mass, and the trapped particle fraction, which can vary widely
D. Fajardo +3 more
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Investigation of core impurity transport in DIII-D diverted negative triangularity plasmas
Plasma Physics and Controlled Fusion, 2022 Tokamak operation at negative triangularity has been shown to offer high energy confinement without the typical disadvantages of edge pedestals (Marinoni et al 2021 Nucl. Fusion 61 116010).
Flavien Sciortino +14 more
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Turbulent impurity transport simulations in Wendelstein 7-X plasmas [PDF]
Journal of Plasma Physics, 2020 A study of turbulent impurity transport by means of quasilinear and nonlinear gyrokinetic simulations is presented for Wendelstein 7-X (W7-X). The calculations have been carried out with the recently developed gyrokinetic code stella.
J. M. García-Regaña +10 more
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Dependence of the impurity transport on the dominant turbulent regime in ELM-y H-mode discharges on the DIII-D tokamak [PDF]
, 2020 Laser blow-off injections of aluminum and tungsten have been performed on the DIII-D tokamak to investigate the variation of impurity transport in a set of dedicated ion and electron heating scans with a fixed value of the external torque.
Tomáš Odstrčil +8 more
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Nuclear Fusion, 2023 The standard neoclassical theory of the impurity transport in tokamak plasma is improved by including the plasma elongation effect. The neoclassical up/down asymmetry of the impurity density is largely enhanced by the plasma elongation and is under ...
Chengkang Pan
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Pfirsch–Schlüter impurity transport in stellarators [PDF]
Physics of Plasmas, 2010 The Pfirsch–Schluter transport of impurities is calculated for stellarator geometry. Contrary to the tokamak case, where the only contribution to the particle flux arises from friction between different species, in a stellarator there is another source of impurity transport due to pressure anisotropy.
Braun, S., Helander, P.
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Observation of tearing mode triggering by sawtooth crash with high-Z impurity accumulation in EAST
AIP Advances, 2023 The high-Z impurity accumulation in the plasma core could degrade the plasma performance and may affect sawtooth crash and trigger tearing modes (TMs) in experimental advanced superconducting tokamak (EAST).
Shanshan Pan +11 more
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Nuclear Fusion, 2023 We assess the turbulent particle transport being responsible for the limitation of the confinement and, thus, the overall performance of the neoclassically optimized stellarator Wendelstein 7-X.
J.A. Alcusón +15 more
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