Abstract
This paper discusses the dependence of performance of an aperiodic rf mass spectrometer on various factors. The influence of (a) initial energy spread from the ion source itself, (b) thermal energy spread of the ion beam, (c) space-charge effect in the analyzer as well as in the ion source, (d) microoptics of the analyzer grids, (e) inaccurate alignment of the analyzer configuration, and (f) shape, strength, and stability of the modulating signal upon the mass-spectrum line shape and hence the resolving power of the Bennett type rf mass spectrometer has been investigated. The solution of the energy modulating function has been determined using an I.B.M. computer 1620 and the maximum permissible inaccuracies in the stage separations are determined.
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