Nonlinear simulations are carried out for the microtearing mode using particle-based δ f gyrokinetic simulations for parameters relevant to spherical tokamaks. The present study finds that the microtearing mode can generate significant electron heat flux, which is predominantly carried out by the electromagnetic component of the heat flux with a negligible contribution from the electrostatic component. The mode sustains without the electrostatic component. We observe that the electron heat flux increases with the electron temperature gradient. The heat flux exhibits a very weak dependence on the collisions. It increases with electron β initially; however, at very high β, the electron heat flux is reduced.

中文翻译：

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微撕裂模式的细胞回转动力学模拟中的非线性δ f 粒子

对于与球形托卡马克相关的参数，使用基于粒子的 δ f 陀螺动力学模拟对微撕裂模式进行非线性模拟。目前的研究发现微撕裂模式可以产生显着的电子热通量，这主要由热通量的电磁分量进行，静电分量的贡献可以忽略不计。该模式在没有静电分量的情况下维持。我们观察到电子热通量随着电子温度梯度的增加而增加。热通量对碰撞表现出非常弱的依赖性。它最初随着电子 β 增加；然而，在非常高的 β 下，电子热通量会降低。