26 September 1995 Negative electron affinity photocathodes as high-performance electron sources-Part 2: Energy spectrum measurements
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Abstract
The energy spectra of electrons emitted from transmission-mode negative electron affinity photocathodes have been measured at high resolution using a parllel-plate retarding technique. The spectra from GaAs photocathodes have a basic structure that varies with temperature, activation layer qualitites, cathode thickness, and illuminating wavelength. A FWHM energy spread of approximately 50meV at room temperature has been achieved. Spectra from a GaAsP cathode show a markedly different structure and a much wider energy spread.
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Aaron W. Baum, Aaron W. Baum, William E. Spicer, William E. Spicer, Roger Fabian W. Pease, Roger Fabian W. Pease, Kenneth A. Costello, Kenneth A. Costello, Verle W. Aebi, Verle W. Aebi, } "Negative electron affinity photocathodes as high-performance electron sources-Part 2: Energy spectrum measurements", Proc. SPIE 2550, Photodetectors and Power Meters II, (26 September 1995); doi: 10.1117/12.221430; https://doi.org/10.1117/12.221430
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