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Article
Variations in Cathodoluminescent Intensity of Spacecraft Materials Exposed to Energetic Electron Bombardment
IEEE Tran. Plasma Science
  • Justin Dekany, Utah State University
  • Justin Christensen, Utah State University
  • JR Dennison, Utah State Univesity
  • Amberly Evans Jensen, Utah State University
  • Gregory Wilson, Utah State University
  • Todd Schneider
  • Charles W Bowers
  • Robert Meloy
Document Type
Article
Publication Date
1-1-2015
DOI
10.1109/TPS.2015.2480086
Abstract

Many contemporary spacecraft materials exhibit cathodoluminescence when exposed to electron flux from the space plasma environment. A quantitative, physics-based model has been developed to predict the intensity of the total glow as a function of incident electron current density and energy, temperature, and intrinsic material properties. We present a comparative study of the absolute spectral radiance for more than 20 types of dielectric and composite materials based on this model which spans more than three orders of magnitude. Variations in intensity are contrasted for different electron environments, different sizes of samples and sample sets, different testing and analysis methods, and data acquired at different test facilities. Together, these results allow us to estimate the accuracy and precision to which laboratory studies may be able to determine the response of spacecraft materials in the actual space environment. It also provides guidance as to the distribution of emissions that may be expected for sets of similar flight hardware under similar environmental conditions.

Citation Information
Justin Dekany, Justin Christensen, JR Dennison, Amberly Evans Jensen, et al.. "Variations in Cathodoluminescent Intensity of Spacecraft Materials Exposed to Energetic Electron Bombardment" IEEE Tran. Plasma Science (2015)
Available at: http://works.bepress.com/justin_christensen/5/