scholarly journals Transport of Parallel Momentum by Toroidal Ion Temperature Gradient Instability near Marginality

2009 ◽  
Author(s):  
E.S. Yoon and T.S. Hahm
Keyword(s):  
Temperature Gradient ◽  
Ion Temperature ◽  
Ion Temperature Gradient ◽  
Parallel Momentum ◽  
Gradient Instability

Anomalous transport driven by ion temperature gradient instability in an anisotropic deuterium-tritium plasma

2021 ◽  
Author(s):  
Debing Zhang ◽  
Limin Yu ◽  
Erbing Xue ◽  
Xianmei Zhang ◽  
Haijun Ren
Keyword(s):  
Temperature Gradient ◽  
Anomalous Transport ◽  
Equilibrium Distribution Function ◽  
Base Case ◽  
Ion Temperature ◽  
Temperature Anisotropy ◽  
Ion Temperature Gradient ◽  
Anisotropic Factor ◽  
Factor Alpha ◽  
Gradient Instability

Abstract In the nowadays and future fusion devices such as ITER and CFETR, as the use of various heating schemes, the parallel and perpendicular temperature of plasmas can be different; this temperature anisotropy may have significant effects on the turbulence. In this work, the anomalous transport driven by the ion temperature gradient instability is investigated in an anisotropic deuterium-tritium (D-T) plasma. The anisotropic factor $\alpha$, defined as the ratio of perpendicular temperature to parallel temperature, is introduced to describe the temperature anisotropy in the equilibrium distribution function of D. The linear dispersion relation in local kinetic limit is derived, and then numerically evaluated to study the dependence of mode frequency on the anisotropic factor $\alpha$ and the proportion for T particle $\vareT$ by choosing three sets of typical parameters, denoted as the cyclone base case (CBC), ITER and CFETR cases. Based on the linear results, the mixing length model approximation is adopted to analyze the quasi-linear particle and energy fluxes for D and T. It is found that choosing small $\alpha$ and large $\vareT$ is beneficial for the confinement of particle and energy for D and T. This work may be helpful for the estimation of turbulent transport level in the ITER and CFETR devices.

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