Simulation of plasma fluxes to material surfaces with self-consistent edge turbulence and transport for tokamaks
نویسندگان
چکیده
منابع مشابه
Self-organized-criticality model consistent with statistical properties of edge turbulence in a fusion plasma.
The statistical properties of the intermittent signal generated by a recent model for self-organized criticality are examined. A successful comparison is made with previously published results of the equivalent quantities measured in the electrostatic turbulence at the edge of a fusion plasma. This result reestablishes self-organized criticality as a potential paradigm for transport in magnetic...
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The development of magnetic fusion energy is a continuing national priority. Present day toroidally confined plasma experiments (tokamaks) are producing fusion power comparable to the input power needed to heat the plasma (Pfusion ≈ 0.3Pin). One of the basic physics problems is to understand turbulent transport phenomena, which cause particles and energy to escape the confining magnetic fields....
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where θ is the density of impurities, μθ the collisional diffusivity, and ζ = mθ qθ e mi ρs Ln the influence of inertia, which enters via the polarization drift. The latter makes the flow compressible, consequently for ideal (massless) impurities, ζ = 0 and advection is due to the incompressible electric drift only. In all cases the impurity density is assumed to be so low compared to the bulk ...
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Plasma/material interactions is a critical scientific issue for fusion power, with major potential limitations on plasma core and edge operating parameters. Gaining understanding and predictive capability in this area will require simultaneously addressing complex and diverse physics occurring over a wide range of lengths (angstroms to meters) and times (femtoseconds to days). This requires fur...
متن کاملImpurity Transport in 3D Plasma Edge Turbulence
with τe being the electron collision time. nEQ is an equilibrium density associated with neoclassical fields and currents. K (nEQ) =−∇qJPS, which in turn is driven by the corresponding neoclassical potential JPS = 1 C (φPS). The contribution of impurities to the gross plasma density ni,0 is assumed to be negligible, i. e. ni = ni,0+nimp ≈ ni,0. For cold impurities the ion-drift velocity is give...
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ژورنال
عنوان ژورنال: Journal of Nuclear Materials
سال: 2005
ISSN: 0022-3115
DOI: 10.1016/j.jnucmat.2004.10.023