Electron-Optical Properties of Homogeneous Magnetic and Radial Electric Fields.

摘要

For various purposes it is often desired to change the direction or alter the characteristics of a given beam of ions. This can be done with various combinations of magnetic and electric fields, of which a homogeneous magnetic field and a radial electric field, such as is found inside an electrostatic deflector, are among the easiest to produce. It is the purpose of this report to summarize the optical properties of these two types of fields, and of various combinations thereof. It is always assumed that the electric and magnetic fields are perpendicular wherever they are superimposed, are plane bounded, and that the beam is in what shall be called the horizontal plane, which is defined as the plane perpendicular to the magnetic field and/or parallel to the electric field. The discussion will be confined to effects of the first order in the deviations in position, direction, velocity, and mass of the ions from reference values.