THE ION OPTICAL PROPERTIES AND SECOND ORDER ABERRATION OF THE CROSSED TOROIDAL ELECTRIC AND INHOMOGENEOUS MAGNETIC FIELDS AS A MASS SPECTROMETER
重叠的环形电场和非均匀磁场质谱分析器的离子光学性质及其二级象差

The ion optical properties of the crossed toroidal electric and inhomogeneous magnetic fields as a mass spectrometer are discussed. By means of Fermat's principle, the equations of ion trajectory are derived. The second order aberration are calculated for the crossed fields mass spectrometer.