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Radial Electric Field Dependence of Neoclassical Poloidal and Toroidal Viscosity Coefficients
Radial Electric Field Dependence of Neoclassical Poloidal and Toroidal Viscosity Coefficientsopenaire +1 more source
Theory for island induced neoclassical toroidal plasma viscosity in tokamaks
Nuclear Fusion, 2011 Error fields and resistive magnetohydrodynamic modes are ubiquitous in real tokamaks. They break the toroidal symmetry in | B | in tokamaks. Here, B is the magnetic field.
K.C. Shaing +3 more
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Physics of Plasmas, 2016 Effects of neoclassical toroidal viscosity (NTV) induced by intrinsic error fields and toroidal field ripple on cocurrent toroidal rotation in H-mode tokamak plasmas are investigated. It is expected that large NTV torque can be localized at the edge region through the 1/ν-regime in the vicinity of Er∼0 in the cocurrent rotating H-mode plasma. Numerical
JaeChun Seol, Yongkyoon In, A Y Aydemir
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Peak neoclassical toroidal viscosity at low toroidal rotation in the DIII-D tokamak
Physics of Plasmas, 2011 Observation of a theoretically predicted peak in the neoclassical toroidal viscous (NTV) force as a function of toroidal plasma rotation rate Ω is reported. The NTV was generated by applying n=3 magnetic fields from internal (I-)coils to low Ω plasmas produced with nearly balanced neutral beam injection.
Cole, A. J. +6 more
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Observation of Plasma Toroidal-Momentum Dissipation by Neoclassical Toroidal Viscosity
Physical Review Letters, 2006Dissipation of plasma toroidal angular momentum is observed in the National Spherical Torus Experiment due to applied nonaxisymmetric magnetic fields and their plasma-induced increase by resonant field amplification and resistive wall mode destabilization. The measured decrease of the plasma toroidal angular momentum profile is compared to calculations
Ronald E Bell +2 more
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Theory comparison and numerical benchmarking on neoclassical toroidal viscosity torque
Physics of Plasmas, 2014Systematic comparison and numerical benchmarking have been successfully carried out among three different approaches of neoclassical toroidal viscosity (NTV) theory and the corresponding codes: IPEC-PENT is developed based on the combined NTV theory but without geometric simplifications [Park et al., Phys. Rev. Lett.
Nikolas Logan, Zhirui Wang, Yueqiang Liu
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Neoclassical toroidal viscosity in perturbed equilibria with general tokamak geometry
Physics of Plasmas, 2013This paper presents a calculation of neoclassical toroidal viscous torque independent of large-aspect-ratio expansions across kinetic regimes. The Perturbed Equilibrium Nonambipolar Transport (PENT) code was developed for this purpose, and is compared to previous combined regime models as well as regime specific limits and a drift kinetic δf guiding ...
Nikolas Logan +2 more
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A Model for the Neoclassical Toroidal Viscosity Effect on Edge Plasma Toroidal Rotation
Contributions To Plasma Physics, 2013AbstractA semianalytic expression for the edge plasma angular toroidal rotation frequency that includes the neoclassical toroidal viscosity braking influence is obtained. Based on the model presented in a previous paper [I.G. Miron, Contrib. Plasma Phys.
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Modelling of the neoclassical toroidal plasma viscosity torque in tokamaks
Nuclear Fusion, 2011 Neoclassical toroidal plasma viscosity (NTV) torque induced by non-axisymmetric magnetic perturbation in the collisionless regimes in tokamaks is modelled by solving the bounce-averaged drift kinetic equation numerically. The detailed comparison between the numerical and the analytic solutions of NTV is discussed in this paper.
Y. Sun +5 more
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Neoclassical viscosity effects on resistive magnetohydrodynamic modes in toroidal geometry
Physics of Fluids B, 1992The flux-surface-averaged linearized resistive magnetohydrodynamic (MHD) boundary-layer equations including the compressibility, diamagnetic drift, and neoclassical viscosity terms are derived in toroidal geometry. These equations describe the resistive layer dynamics of resistive MHD modes over the collisionality regime between the banana plateau and ...
Claude Wendell Horton, Jr., J G Yang
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