Theory and simulation of backbombardment in single-cell thermionic-cathode electron guns.

Edelen, J.P., Biedron, S.G., Harris, J.R., Milton, S.V. and Lewellen, J.W., 2015. Theory and simulation of backbombardment in single-cell thermionic-cathode electron guns. Physical Review Special Topics-Accelerators and Beams, 18(4), p.043402.