论文标题
电子温度梯度驱动的湍流中的非线性对称性断裂
Nonlinear symmetry breaking in electron temperature gradient driven turbulence
论文作者
论文摘要
非线性对称性破坏可能发生在两个或多个状态的系统中，其线性动力学显示某些对称性，其中之一是非线性的。我们已经确定了具有圆形同心通量表面的Tokamak等离子体中电子温度梯度（ETG）不稳定性的状态，其在有限的气球角度具有最大的生长速率，建立了对对称性的对称性，该对称性非线性损坏以偏爱一个符号，以促进一个符号。这是在血浆柱中没有外部施加的流动剪切或不对称性的情况下，在漂移不稳定的模拟中，非线性对称性破坏的第一个例子。
Nonlinear symmetry breaking may occur in systems with two or more states whose linear dynamics displays certain symmetries, one of which is preferred nonlinearly. We have identified a regime of electron temperature gradient (ETG) instabilities in a tokamak plasma with circular concentric flux surfaces that has its largest growth rate at a finite ballooning angle, establishing a symmetry that is nonlinearly broken to favor one sign for the ballooning angle. This is the first example of nonlinear symmetry breaking in simulations of a drift instability in the absence of externally imposed flow shear or asymmetry in the plasma column.
