Masshyphen;Spectrometer Investigation of Electronhyphen;Impact Processes at Pressures to 1 mm Hg

摘要

A mass spectrometer for the study of secondary reactions involving ions, excited species, and molecules is described. The instrument was checked with the Hornbeck—Molnar process for He2+formation in He, O3+, and O4+formation in O2and N3+, and N4+formation in N2. Source pressures to about 1 mm Hg are used. The electron beam is controlled by the retarding potential‐difference technique for reducing the effective width in energy of the electron distribution.