IEEE Transactions on Plasma Science
In recent charging studies, a discernible glow was detected emanating from sample surfaces undergoing electron beam bombardment that resulted from a luminescent effect termed cathodoluminescence. This suggests that some of the materials used as optical elements, structural components, and thermal control surfaces in the construction of space-based observatories might luminesce when exposed to sufficiently energetic charged particle fluxes from the space plasma environment. A central focus of our experiments was the temperature dependence of the luminescent behavior. Here, an overview of our experimental results is given, as well as a qualitative model to describe the luminescent behavior. We look at a simple model of band theory and the filling of localized or trapped states and the electron transitions from which the luminescence originates.
Amberly Evans Jensen, Gregory Wilson, Justin Dekany, Alec M. Sim and JR Dennison “Low Temperature Cathodoluminescence of Space Observatory Materials,” IEEE Trans. on Plasma Sci., 42(1), 2014, 272-277. DOI: 10.1109/TPS.2013.2291873