Proceedings of the 6th Spacecraft Charging Technology Conference
Secondary electron (SE) emission from spacecraft surfaces as a result of energetic electron bombardment is a key process in the electrical charging of spacecraft. It has been suggested that incorporating more complete knowledge of the energy- and angular-distributions of secondary electrons is necessary to fully model how SE emission and spacecraft charging are affected by re-adsorption of low energy electrons in the presence of charge-induced electrostatic fields and ambient magnetic fields in the spacecraft environment. We present data for such energy- and angular-distributions from sputtered, polycrystalline gold surfaces. The data are compared to empirical SE emission models and found to agree well. We also discuss at what level inclusion of such energy- and angular-distributions will affect models of spacecraft charging for both positive and negative surface charging.
Neal Nickles, R.E. Davies and JR Dennison, “Applications of Secondary Electron Energy- and Angular-Distributions to Spacecraft Charging,” Proceedings of the 6th Spacecraft Charging Technology Conference, (Air Force Research Laboratory Science Center, Hanscom Air Force Base, MA, 2000).