5月9日 五室第279期研讨会

报告题目； 氘氚燃烧等离子体阿尔法粒子湍流输运模拟

报 告 人： 胡友俊

主 持 人： 王辉辉

时    间：  2025年5月9日（星期五）下午14:00-15:00

地    点：  8-2楼224会议室

摘    要：

Tokamak δf gyrokinetic codes often hardcode the Maxwellian distribution as the equilibrium distribution for all species involved in the simulations, mainly because of the difficulties in handling the polarization density for distributions other than Maxwellian. Alpha particles often take the slowing-down distribution, which usually significantly deviates from the Maxwellian one. For some gyrokinetic codes, it is nontrivial to switch from a Maxwellian distribution to a slowing-down one because the analytical form of the polarization density used has assumed the Maxwellian distribution, and the numerical method used in solving the gyrokinetic Poisson equation critically relies on the particular analytical form.

In this talk, I will introduce the gyrokinetic code, TEK, which was developed with α particles in mind, and thus can handle the slowing-down distribution accurately. ITG turbulence simulations using TEK were performed for the CFETR DT burning plasmas.  The results indicate that the presence of α particles has negligible effect on ITG turbulence and DT heat transport. Meanwhile, transport of α particles in ITG turbulence is 3 order lower than that of DT. The simulations also confirm the isotope effect: Tritium heat diffusivity is lower than than that of Deuterium. The nonlinear simulations were performed using the electrostatic model with adiabatic electrons. Some linear simulations with electromagnetic perturbations and kinetic electrons will also be presented. 

欢迎感兴趣的老师同学参加！