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Neoclassical transport in stellarators [PDF]
The Physics of Fluids, 1987 The stellarator neoclassical transport caused by particles trapped in local helical wells is calculated in the low-collisionality regime using a systematic expansion. The behavior of electron transport is found to be the same over a wide range of energies but the behavior of ion transport for low-energy ions is found to be different than that for high ...
Ho, Darwin D.-M., Kulsrud, Russell M.
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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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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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Neoclassical transport simulations for stellarators [PDF]
Physics of Plasmas, 2011 The benchmarking of the thermal neoclassical transport coefficients is described using examples of the Large Helical Device (LHD) and TJ-II stellarators. The thermal coefficients are evaluated by energy convolution of the monoenergetic coefficients obtained by direct interpolation or neural network techniques from the databases precalculated by ...
Turkin, Y. +5 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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Neoclassical Transport Including Collisional Nonlinearity
Physical Review Letters, 2011 In the standard δf theory of neoclassical transport, the zeroth-order (Maxwellian) solution is obtained analytically via the solution of a nonlinear equation. The first-order correction δf is subsequently computed as the solution of a linear, inhomogeneous equation that includes the linearized Fokker-Planck collision operator.
J, Candy, E A, Belli
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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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Rotation and neoclassical ripple transport in ITER [PDF]
Nuclear Fusion, 2017 Neoclassical transport in the presence of non-axisymmetric magnetic fields causes a toroidal torque known as neoclassical toroidal viscosity (NTV). The toroidal symmetry of ITER will be broken by the finite number of toroidal field coils and by test blanket modules (TBMs).
E.J. Paul +5 more
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Neoclassical transport in helically symmetric plasmas [PDF]
The Physics of Fluids, 1981 The neoclassical rate of diffusion is calculated in such a way that the result is applicable to both helically symmetric and toroidally symmetric plasmas.
Pytte, A., Boozer, Allen H.
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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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