Dependence of the shape of the instrumental line of a magnetic spectrometer on its ion-optical and design parameters. Point source

A new method for constructing the instrumental line of a magnetic spectrometer is developed. The method takes account of the real character of an experiment, i.e. the fact that the line is formed while the magnetic field in the instrument changes. A detailed study of the dependence of the shape of the instrumental line in a magnetic spectrometer with focusing upon diaphragm number and arrangement is carried out. Rational arrangement of diaphragms in a magnetic spectrometer with focusing is shown to provide two-fold and, in some cases, fourfold increase of resolution as compared with a similar instrument with classical diaphragm arrangement. The examples of practical application of the above method for constructing the instrumental line are given