Me. Abdelaziz et al., USE OF ELECTRON-GUN TO REGULATE THE RADIOFREQUENCY PLASMA PERFORMANCEAND BEAM OPTICS, Review of scientific instruments, 65(4), 1994, pp. 1454-1456
The addition of electrons in both rf plasma and ion beam extracted fro
m a rf ion source enhanced the source's performance and beam optics. T
he increase of plasma intensity increases the charge state of the extr
acted ions. The mixing of electrons with the ions within the ion beam
decreases the space charge effect on beam expansion.