标题： 用于具有弯曲参考轨迹的s相关静态电场和磁场中的粒子跟踪的显式辛积分器 显示英文标题

标题： Explicit symplectic integrator for particle tracking in s-dependent static electric and magnetic fields with curved reference trajectory

摘要： 我们描述了一种用于带电粒子在静态电场和磁场中进行辛跟踪的方法。 该方法可以应用于电场和磁场依赖于纵向以及横向位置的情况，并且参考轨迹可能具有非零曲率。 应用该方法需要标量和矢量势的解析表达式：我们展示了如何从数值场数据中构造出类似于多极展开形式的合适表达式，从而使得该方法可以在仅有数值场数据的情况下使用。 显示英文摘要

摘要： We describe a method for symplectic tracking of charged particles through static electric and magnetic fields. The method can be applied to cases where the fields have a dependence on longitudinal as well as transverse position, and where the reference trajectory may have non-zero curvature. Application of the method requires analytical expressions for the scalar and vector potentials: we show how suitable expressions, in the form of series analogous to multipole expansions, can be constructed from numerical field data, allowing the method to be used in cases where only numerical field data are available.