Enhanced heat conductivity in stochastic magnetic field of tokomak affected by the ratio of the parallel to the perpendicular heat diffusivity
Enhanced heat conductivity in stochastic magnetic field of tokomak affected by the ratio of the parallel to the perpendicular heat diffusivity
复制标题
DOI：
10.1140/epjd/e2012-30331-x
复制
发表时间：
2012-11
期刊：
影响因子：
--
通讯作者：
H. Gao
中科院分区：
文献类型：
--
作者：
H. Gao
为了研究托卡马克等离子体物理中电子在随机磁场中的热输运，数值研究了平行与垂直热扩散率之比对增强热导率及其径向分布的影响。为了了解轮廓的细节，我们选择了非局域随机磁场作为研究对象，其中扰动磁岛彼此分离，但非常接近的小半径的托卡马克，在我们的模拟工作。数值结果表明，平行与垂直方向的热扩散率之比是一个非常重要的影响因素，它决定了扰动磁场对小半径有理曲面的热导率的影响。此外，本文还对该问题进行了理论分析，并与数值计算结果进行了比较。
Electron heat transport across stochastic magnetic fields is studied numerically in order to find out how the ratio of the parallel to the perpendicular heat diffusivity affects the enhanced heat conductivity and its radial profile in tokomak plasma physics. To find out the details of profile, non-local stochastic magnetic fields, in which the perturbed magnetic islands are separated with each other but very close to in the minor radius of tokomak, are chosen as research objects in our simulation work. Our numerical results indicate that the ratio of the parallel to the perpendicular heat diffusivity is a very important effective factor, which dominate how far the enhanced conductivity contributed by a perturbed magnetic field approach to zero from the rational surface in minor radius. Besides that, a theoretical analysis was provided and compared with the numerical results in this article.