THE SECOND ORDER TRAJECTORIES AND TRANSFER FORMULAE IN CROSSED TOROIDAL ELECTRIC AND INHOMOGENEOUS MAGNETIC FIELDS
环形电场与非均匀磁场重叠场中能量分散形式的二级离子轨迹及其转换公式

The second order ion trajectories in crossed toroidal electric and inhomogeneous magnetic fields are derived by means of the Fermat's principle and expressed in energy deviation. The ion trajectory formulae may be transferred into velocity or momentum deviation. The transfer formulae between different deviations are given in detail.