与对称性无关的仿星器用于无碰撞约束
Symmetry-agnostic stellarators for collisionless confinement
AI总结：
本研究针对无需准对称性等性质即可约束α粒子的混合对称性仿星器，提出通用理论，基于 Whitham 调制理论定义 iso-action，开发 proxy Γ_W 衡量错位代价，为无碰撞约束提供新方法。
AI中文摘要：
准对称性、全向性和分段全向性通过使 bounce 作用量与场线标签无关来约束捕获粒子。近期优化产生了混合对称性仿星器，无需这些性质即可很好地约束α粒子，我们为其提出了一套通用理论。从 Whitham 调制理论出发，我们定义了 iso-action，该概念仅要求漂移面闭合，允许与磁面错位。一个可解模型提供了捕获段之间的精确关系，同时分支作用量发生变化。我们开发了一个 proxy Γ_W 来衡量错位带来的代价。
英文摘要：
Quasisymmetry, omnigenity and piecewise omnigenity confine trapped particles by making the bounce action independent of the field-line label. Recent optimizations produce mixed-symmetry stellarators that confine alpha particles well without them. We propose a general theory for them. From Whitham modulation theory we define iso-action, which requires only that the drift surface close and allows misalignment with flux surfaces. A solvable model supplies an exact relation between trapped segments while branch actions vary. We develop a proxy $Γ_W$ for the reach that misalignment costs.
