Journal ArticleDOI
Neoclassical transport of impurities in tokamak plasmas
S.P. Hirshman,D.J. Sigmar +1 more
TLDR
In this paper, a closed set of moment equations is presented for the time evolution of thermodynamic and magnetic field quantities which results from collisional transport of the plasma and two-dimensional motion of the magnetic flux surface geometry.Abstract:
Tokamak plasmas are inherently comprised of multiple ion species. This is due to wall-bred impurities and, in future reactors, will result from fusion-born alpha particles. Relatively small densities nI, of highly charged non-hydrogenic impurities can strongly influence plasma transport properties whenever . The determination of the complete neoclassical Onsager matrix for a toroidally confined multispecies plasma, which provides the linear relation between the surface averaged radial fluxes and the thermodynamic forces (i.e. gradients of density and temperature, and the parallel electric field), is reviewed. A closed set of one-dimensional moment equations is presented for the time evolution of thermodynamic and magnetic field quantities which results from collisional transport of the plasma and two-dimensional motion of the magnetic flux surface geometry. The effects of neutral-beam injection on the equilibrium and transport properties of a toroidal plasma are consistently included.read more
Citations
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Journal ArticleDOI
Formation of edge and internal transport barriers in tokamaks by Alfvén waves
TL;DR: In this paper, it was demonstrated that a small radial localization of the rf wave can be used to create strongly sheared plasma flows at any point of the plasma minor radius, to suppress the plasma turbulence and to obtain the locally reversed magnetic shear configuration.
Journal ArticleDOI
High performance double-null plasmas under radiating divertor and mantle scenarios on DIII-D
T.W. Petrie,Brian Grierson,T.H. Osborne,C.C. Petty,Francesca Turco,S.L. Allen,M.E. Fenstermacher,J.R. Ferron,Houyang Guo,E.T. Hinson,R.J. La Haye,C.J. Lasnier,A.W. Leonard,Adam McLean,Brian Victor,Huiqian Wang,J.G. Watkins +16 more
TL;DR: In this article, the authors show that using higher-Z seed impurities to form a radiating mantle increases deleterious MHD activity when applied to these AT DND plasmas.
Journal ArticleDOI
Rotation and Neoclassical Ripple Transport in ITER
TL;DR: In this paper, the authors used the Stellarator Fokker-Planck Iterative Neoclassical Conservative Solver (SFINCS) to estimate the toroidal flow in the presence of non-axisymmetric magnetic fields.
A moment-based model for plasma dynamics at arbitrary collisionality
TL;DR: In this paper, a drift-kinetic and a gyrokinetic model is developed to describe the plasma dynamics in the tokamak periphery, which takes into account electrostatic fluctuations at all relevant scales, allowing for comparable amplitudes of background and fluctuating components.
References
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Book
Reviews of Plasma Physics
TL;DR: In this article, Rozhansky et al. studied the relationship between transverse conductivity and the generation of self-consistent electric fields in strongly ionized magnetized plasma.
Journal ArticleDOI
Transport phenomena in a completely ionized gas
Lyman Spitzer,Richard Harm +1 more
TL;DR: In this paper, the effect of mutual electron encounters is considered as a problem of diffusion in velocity space, taking into account a term which previously had been neglected, and the appropriate integro-differential equations are then solved numerically.
Journal ArticleDOI
Theory of plasma transport in toroidal confinement systems
F. L. Hinton,Richard D Hazeltine +1 more
TL;DR: A review of magnetized-plasma transport theory can be found in this paper, with a focus on the application to axisymmetric tokamak-type confinement systems.