Ion densities in a positive column He-Cd+ laser discharge

Abstract
By combining the modified absorption method with the modified double‐probe method, the He+ and Cd+ ion densities in a cataphoresis type of positive column He‐Cd+ laser discharge were separated without using the Cd+ ion mobility. They agreed with the He+ and Cd+ ion densities calculated on the basis of the electron energy distribution function in the He‐Cd discharge well.