论文标题
中性颗粒的磁陷阱的性能边界
Performance Bounds of Magnetic Traps for Neutral Particles
论文作者
论文摘要
对中性颗粒的磁陷阱的基本局限性的了解对设计师而言至关重要，因为它可以快速评估特定陷阱要求的可行性或给定设计的质量。在本文中，使用陷阱中心中的局部近似值定义了磁陷阱电势和偏置场的凸性限制。例如，以球形壳，圆柱区域和盒子的形式为当前支撑区域计算基本界限。考虑到这两个目标，并将其与棒球陷阱的已知设计和Ioffe-pritchard陷阱的设计进行了比较，帕累托最佳套件。该比较揭示了从基本限制中的经典陷阱设计的性能存在显着差距。这表明采用改进的陷阱设计和现代形状合成技术的可能性，以证明其存在。与传统设计相比，拓扑优化的陷阱的性能要好得多两倍。最后但并非最不重要的一点是，开发的框架可能是对更广泛的等离子体限制的基本限制的原型。
Knowledge of the fundamental limitations on a magnetic trap for neutral particles is of paramount interest to designers as it allows for the rapid assessment of the feasibility of specific trap requirements or the quality of a given design. In this paper, performance limitations are defined for convexity of magnetic trapping potential and bias field using a local approximation in the trapping center. As an example, the fundamental bounds are computed for current supporting regions in the form of a spherical shell, a cylindrical region, and a box. A Pareto-optimal set considering both objectives is found and compared with known designs of the Baseball trap and Ioffe-Pritchard trap. The comparison reveals a significant gap in the performance of classical trap designs from the fundamental limitations. This indicates a possibility of improved trap designs and modern techniques of shape synthesis are applied in order to prove their existence. The topologically optimized traps perform almost two times better as compared to conventional designs. Last, but not least, the developed framework might serve as a prototype for the formulation of fundamental limitations on plasma confinement in a wider sense.
