All Physics Faculty Presentations


Instrumentation for Precise Energy- and Angle -Resolved Secondary Electron Emission Measurements

Document Type

Conference Paper

Journal/Book Title/Conference

Bulletin of the American Physical Society



Publication Date



The production of secondary electrons (SE) by energetic electron or ion bombardment involves multiple events including electron-electron and electron-lattice scattering. To date, the details of the mechanisms for SE production and emission are not well understood, and few accurate cross section measurements are available. Current instrumentation developed at USU has been used to measure the energy-angle resolved double differential SE cross section of elemental metals. Samples are bombarded with <20 eV to 30 keV electrons. For energy-resolved measurements, a hemispherical retarding-field analyzer is employed. A custom retarding-field Faraday cup detector, rotatable about sample position, measures the energy-angle resolved cross section. Details of instrumentation, experimental methods, and characteristic data will be presented. This work is supported by grants from the AFOSR/DURIP Program and the NASA/SEE Program.


Bull. Am. Phys. Soc. 44(1) Part I, 739 (1999). American Physical Society Four Centennial Meeting, Atlanta , GA