An Ultra-High Vacuum Mass Spectrometer for the Study of the Surfaces of Solids

摘要

A new ultra-high vacuum mass spectrometer for the study of the surfaces of solids is described. Surface atoms are removed either by ion bombardment or by evaporation and are mass analyzed in a 60° sector field mass spectrometer with a six-inch radius of curvature. The design, construction, and operation of the instrument and its associated apparatus are discussed in some detail. The results of certain experiments on the surfaces of three refractory metals (molybdenum, tantalum, and platinum) are presented in order to indicate both the poten?tialities and the limitations of the instrument in its present form. A more detailed discussion of these experiments will be presented in later reports.