SECONDARY-ELECTRON EMISSION FROM SOLID-SURFACE IN AN OBLIQUE MAGNETIC-FIELD

It is numerically demonstrated that the electric field in the sheath and its finite thickness have a great influence on the release of secondary electrons from the surface of the target plate with a grazing incident magnetic field, although usually the Lorentz force is said to make almost all the electrons return to the plate. The magnetic sheath was found to have little effect on the emission fraction due to the weakness of its electric force. A distribution of the ejection angle for emitted electrons is considered in the analysis. A measure for determining the emission fraction is given.