Results 11 to 20 of about 41,540 (235)
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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First-principles based plasma profile predictions for optimized stellarators
Nuclear Fusion, 2023 In the present Letter, first-of-its-kind computer simulations predicting plasma profiles for modern optimized stellarators—while self-consistently retaining neoclassical transport, turbulent transport with 3D effects, and external physical sources—are ...
A. Bañón Navarro +8 more
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Performance comparison between the ITER- and DEMO-like plasmas using CRONOS simulations [PDF]
Songklanakarin Journal of Science and Technology (SJST), 2019 This work investigates plasma performance and fusion power production of the ITER- and DEMO-like plasmas using the integrated predictive modelling code CRONOS. These plasmas are simulated in the presence of an edge transport barrier (ETB).
Boonyarit Chatthong, Jiraporn Promping
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Nuclear Fusion, 2023 Neoclassical properties in quasi-axisymmetric (QA) stellarators are analogous to these in tokamaks. Consequently, a substantial bootstrap current could significantly modify the MHD equilibrium properties of a QA stellarator, which is an important ...
Haifeng Liu +12 more
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Kinetic neoclassical calculations of impurity radiation profiles
Nuclear Materials and Energy, 2017 Modifications of the drift-kinetic transport code XGC0 to include the transport, ionization, and recombination of individual charge states, as well as the associated radiation, are described.
D.P. Stotler +6 more
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Kinetic Simulations of Neoclassical and Anomalous Transport Processes in Helical Systems [PDF]
, 2012 Drift kinetic and gyrokinetic theories and simulations are powerful means for quantitative predictions of neoclassical and anomalous transport fluxes in helical systems such as the Large Helical Device (LHD).
Hideo SUGAMA +5 more
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Nuclear Fusion, 2023 This work presents a study of plasma transport at low aspect ratio on the National Spherical Torus Experiment tokamak, where the turbulent and neoclassical energy fluxes calculated by the quasilinear Trapped Gyro Landau Fluid (TGLF) model and the multi ...
G. Avdeeva +10 more
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Gyrokinetic particle simulation of neoclassical transport [PDF]
Physics of Plasmas, 1995 A time varying weighting (δf ) scheme for gyrokinetic particle simulation is applied to a steady-state, multispecies simulation of neoclassical transport. Accurate collision operators conserving momentum and energy are developed and implemented. Simulation results using these operators are found to agree very well with neoclassical theory. For example,
Z. Lin, W. M. Tang, W. W. Lee
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Impurities in a non-axisymmetric plasma: transport and effect on bootstrap current [PDF]
, 2015 Impurities cause radiation losses and plasma dilution, and in stellarator plasmas the neoclassical ambipolar radial electric field is often unfavorable for avoiding strong impurity peaking.
Braun, Stefanie +4 more
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Prevention of core particle depletion in stellarators by turbulence
Physical Review Research, 2023 In reactor-relevant plasmas, neoclassical transport drives an outward particle flux in the core of large stellarators and predicts strongly hollow density profiles. However, this theoretical prediction is contradicted by experiments.
H. Thienpondt +12 more
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