The performance of both large linear electron accelerators and smaller-scale ultrafast electron-diffraction setups is limited by the source of electrons, the photocathode. This study shows how a nonuniform surface of the source affects the energies of emitted electrons, using fundamental physics principles to guide the engineering of photocathodes, and thus giving insight to improve potentially all such applications.
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Karkare et al. (2015) studied this question.
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