Jorge R, Dorland W, Kim P, Landreman M, Mandell N R, Merlo G, Qian T
Instituto de Plasmas e Fusão Nuclear, <a href="https://ror.org/03db2by73">Instituto Superior Técnico</a>, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
Department of Physics, <a href="https://ror.org/01y2jtd41">University of Wisconsin-Madison</a>, Madison, Wisconsin 53706, USA.
Phys Rev E. 2024 Sep;110(3-2):035201. doi: 10.1103/PhysRevE.110.035201.
Turbulent transport is regarded as one of the key issues in magnetic confinement nuclear fusion, both for tokamaks and stellarators. In this work, we show that a significant decrease in a microstability-based proxy, as opposed to a geometric one, for the turbulent heat flux, namely the quasilinear heat flux, can be obtained in an efficient manner by coupling stellarator optimization with linear gyrokinetic simulations. This is accomplished by computing the quasilinear heat flux at each step of the optimization process, as well as the deviation from quasisymmetry, and minimizing their sum, leading to a balance between neoclassical and the turbulent transport proxy.
对于托卡马克和仿星器而言，湍流输运被视为磁约束核聚变中的关键问题之一。在这项工作中，我们表明，通过将仿星器优化与线性回旋动理学模拟相结合，可以有效地大幅降低基于微观稳定性而非几何因素的湍流热通量代理指标，即准线性热通量。这是通过在优化过程的每一步计算准线性热通量以及与准对称的偏差，并使它们的和最小化来实现的，从而在新经典输运和湍流输运代理指标之间达成平衡。
