Studies of Charge Exchange in a High‐Pressure Pulsed Electron Impact Source

Abstract

A high pressure pulsed ion source has been used in a time‐of‐flight mass spectrometer in order to study the charge exchangereactions in Ar–H2 and Ar–D2 systems using the ion source in the Čermák mode of operation. As the source was used in a pulsed mode, it was possible to identify the various secondary ions arising from the charge exchangereactions in these systems. Very good agreement has been shown to exist between the experimental results and simple theoretical deductions. Calculations have been made to determine the cross sections for the charge exchangereactions between the various species from the experimental data.