Results 1 to 10 of about 17,120 (160)
Nuclear Materials and Energy, 2022 Tungsten (W) impurity transport and the corresponding core W accumulation is a critical issue in tokamak with W as plasma facing material. In this work, a kinetic W impurity transport code based on the guiding center approximation is applied for the ...
Yihan Wu +5 more
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Impurity ion transport by filamentary plasma structures
Nuclear Materials and Energy, 2019 We have studied the impurity ion transport by a filamentary plasma structure with the three-dimensional electrostatic particle-in-cell simulation. The effective diffusivity of the impurity ions transported by a filamentary plasma structure has been ...
Hiroki Hasegawa, Seiji Ishiguro
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SOLPS-ITER modification for impurity transport modelling in the tokamak pedestal region
Nuclear Materials and EnergyKinetic corrections to SOLPS-ITER fluid equations are made to extend their applicability for description of the neoclassical part of impurity transport to collisionless regimes of the main ions.
V. Korzueva +3 more
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Impurity Transport Studies on LHD
Plasma and Fusion Research, 2007 The preliminary results of impurity transport studies in the Large Helical Device (LHD) by means of a newly developed the Stellarator Impurity Transport code SIT STRAHL [1] are reported. The attenuation of the emission lines from the ionized Ti ions, launched in the plasma edge by means of the TESPEL injector has been numerically simulated and compared
Sadayoshi Murakami, Naoki Tamura
exaly +3 more sources
Suppression of anomalous impurity transport in NBI-heated W7-X plasmas
Nuclear Fusion, 2023 Radial impurity density profiles in two Wendelstein 7-X (W7-X) experiments heated by neutral beam injection (NBI) are analyzed with respect to their impurity transport properties.
T. Romba +6 more
doaj +1 more source
Topological transport of mobile impurities [PDF]
Physical Review B, 2021 We study the Hall response of topologically trivial mobile impurities (Fermi polarons) interacting weakly with majority fermions forming a Chern-insulator background. This setting involves a rich interplay between the genuine many-body character of the polaron problem and the topological nature of the surrounding cloud.
Pimenov, D. +5 more
openaire +6 more sources
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
doaj +1 more source
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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On neoclassical impurity transport in stellarator geometry [PDF]
Plasma Physics and Controlled Fusion, 2013 The impurity dynamics in stellarators has become an issue of moderate concern due to the inherent tendency of the impurities to accumulate in the core when the neoclassical ambipolar radial electric field points radially inwards (ion root regime).
Garcia-Regana, J. +5 more
openaire +4 more sources