AI 中文总结
该研究提出仿星器优化算法，通过数值方法计算周期轨道不动点，联合优化模块化线圈与真空容器，实现多种偏滤器拓扑，首次在仿星器中得到精确雪花形偏滤器，生成STAR Lite原型候选设计。
AI 中文摘要
我们提出了用于设计真空场中边缘磁结构及真空容器的仿星器优化算法。首先，我们引入一种数值方法，该方法可稳健计算任意类型（椭圆型、双曲型或抛物型）的周期轨道不动点，这类不动点可构成偏滤器的基础。为耦合偏滤器与真空容器的设计，我们引入了参数化的真空容器族，可高效计算点到容器的距离及其导数。所得算法使用有符号距离函数来确保线圈与容器的间隙，同时允许线圈放置在容器上或容器外。利用这些方法，我们对模块化线圈与真空容器进行联合优化，以实现多种用于排出废气的磁拓扑，包括标准X点偏滤器、单零和双零构型。我们首次证明，仿星器中可实现精确的雪花形偏滤器。借助该框架，我们生成了多个具有兼容真空容器及不同偏滤器架构的准轴对称仿星器设计，这些设计被视为下一代STAR Lite原型的候选方案。
英文摘要
We present stellarator optimization algorithms for designing the edge magnetic structure in vacuum fields, together with the vacuum vessel. First, we introduce a numerical method that robustly computes periodic-orbit fixed points of any type (elliptic, hyperbolic, or parabolic), which could form the basis of a divertor. To couple divertor and vacuum vessel design, we introduce parametric families of vacuum vessels for which point-to-vessel distances, and their derivatives, can be computed efficiently. The resulting algorithms use signed distance functions to enforce coil-vessel clearance while allowing coils to be placed on or off the vessel. Using these methods, we jointly optimize modular coils and the vacuum vessel to realize a wide range of magnetic topologies for diverting exhaust, including standard X-point divertors, and single- and double-null configurations. For the first time, we show that precise snowflake divertors can be achieved in stellarators. Using this framework, we generate a number of quasi-axisymmetric stellarator designs with compatible vacuum vessels and diverse divertor architectures, which we consider to be candidates for a next-generation STAR Lite prototype.
