Results 11 to 20 of about 2,547,829 (287)
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 ...
E. Paul +5 more
semanticscholar +6 more sources
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).
Beidler C D +14 more
core +4 more sources
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
exaly +4 more sources
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 ...
Y. Turkin +5 more
semanticscholar +6 more sources
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
exaly +3 more sources
Charge dependence of neoclassical and turbulent transport of light impurities on MAST [PDF]
, 2015 Carbon and nitrogen impurity transport coefficients are determined from gas puff experiments carried out during repeat L-mode discharges on the Mega-Amp Spherical Tokamak (MAST) and compared against a previous analysis of helium impurity transport on ...
S. Henderson +9 more
semanticscholar +4 more sources
Plasma and Fusion Research, 2008 In helical systems, neoclassical transport is one of the important issues in addition to anomalous transport, because of a strong temperature dependency of heat conductivity and an important role in the radial electric field determination. Therefore, the development of a reliable tool for the neoclassical transport analysis is necessary for the ...
Sadayoshi Murakami
exaly +3 more sources
Benchmark test of drift-kinetic and gyrokinetic codes through neoclassical transport simulations
Computer Physics Communications, 2010 Two simulation codes that solve the drift-kinetic or gyrokinetic equation in toroidal plasmas are benchmarked by comparing the simulation results of neoclassical transport.
Shinsuke Satake +3 more
semanticscholar +3 more sources
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.
openaire +3 more sources
Plasma Physics and Controlled Fusion, 2023 The influence of rotation, collisionality and trapped particle fraction on the magnitude and direction of neoclassical impurity transport in tokamaks is analyzed using an extensive database of drift-kinetic simulations with the NEO code. It is shown that
D. Fajardo +5 more
semanticscholar +1 more source