Results 11 to 20 of about 831 (206)
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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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
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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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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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Classical and Neoclassical Transport in Tokamaks [PDF]
Fusion Science and Technology, 2012 These lecture notes provide a short overview of classical and neoclassical transport in tokamaks.
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Neoclassical toroidal plasma viscosity in bounce-transit and drift resonance regimes in tokamaks
Nuclear Fusion, 2023 Neoclassical toroidal plasma viscosity in the bounce-transit and drift resonance regimes is calculated using a version of the drift kinetic equation that encompasses the physics of the nonlinear trapping and quasilinear plateau regimes in tokamaks. It is
K.C. Shaing, M. Garcia-Munoz, E. Viezzer
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Monte Carlo computations of neoclassical transport [PDF]
The Physics of Fluids, 1988 Neoclassical transport coefficients and confinement times in stellarators of general geometry and tokamaks with and without ripple are computed by Monte Carlo simulation over wide ranges of mean free paths, ratios of plasma to gyroradius, and radial electric fields.
Lotz, W., Nuehrenberg, J.
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Preliminary Result of Neoclassical Impurity Transport Affected by ICRH with a 4-D Fokker-Planck Code [PDF]
EPJ Web of ConferencesTo understand the role of ion cyclotron resonance heating (ICRH) in mitigating tungsten accumulation, we evaluate the impact of ICRH-induced poloidal asymmetries on neoclassical impurity transport using a newly developed 4-D Fokker–Planck code (FP4D ...
Jeong Yunho +4 more
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Neoclassical transport optimization of LHD
Nuclear Fusion, 2002 Neoclassical transport is studied for large helical device (LHD) configurations in which the magnetic axis has been shifted radially by determining the mono-energetic transport coefficient and the effective helical ripple. With respect to the transport in the long mean-free-path collisionality region—the so-called 1/ν transport—the optimum ...
Murakami, S. +6 more
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Locality effects on bifurcation paradigm of L-H transition in tokamak plasmas [PDF]
Songklanakarin Journal of Science and Technology (SJST), 2015 The locality effects on bifurcation paradigm of L-H transition phenomenon in magnetic confinement plasmas are investigated. One dimensional thermal transport equation with both neoclassical and anomalous transports effects included is considered, where
Boonyarit Chatthong, Thawatchai Onjun
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