Skip to main content
Article
Evolution of Secondary Electron Emission Characteristics of Spacecraft Surfaces: Importance to Spacecraft Charging
Proceedings of the 6th Spacecraft Charging Technology Conference
  • Robert Davies, Utah State University
  • JR Dennison, Utah State Univerisy
Document Type
Article
Publication Date
9-1-2000
Disciplines
Abstract
A sample of oxidized aluminum was placed inside an ultra-high vacuum (UHV) chamber alongside a piece of PTFE (Teflon®) coated wire and continuously bombarded with 1-3 keV electrons for ~30 hours. The SE yield of the surface was monitored as a function of time throughout the electron bombardment. Oxidized aluminum was chosen as a typical material comprising spacecraft surfaces, while outgassing of the Teflon wire contaminated the UHV environment, simulating the microenvironment surrounding an operating spacecraft. Continuous electron bombardment resulted in two effects—( i) the removal of the oxide layer, and (ii) the deposition of a thin (~1 nm-thick) layer of carbon contamination—duplicating the surface effects of other processes known to occur in Earth orbit.
Citation Information
R.E. Davies and J.R. Dennison, “Evolution of Secondary Electron Emission Characteristics of Spacecraft Surfaces:Importance to Spacecraft Charging,” Proceedings of the 6th Spacecraft Charging Technology Conference, (Air ForceResearch Laboratory Science Center, Hanscom Air Force Base, MA, 2000).