Effects of Surface Nonuniformities on the Mean Transverse Energy from Photocathodes

Siddharth Karkare, Ivan Bazarov

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


The performance of photoinjectors is limited by the lowest value of the mean transverse energy of the electrons obtained from photocathodes. The factors that influence the mean transverse energy are poorly understood. In this paper, we develop models to calculate the effect of spatial work-function variations and subnanometer-scale roughness and surface defects on the mean transverse energy. We show that these can limit the lowest value of mean transverse energy achieved and that atomically perfect surfaces will be required to further reduce the mean transverse energy obtained from photocathodes.

Original languageEnglish (US)
Article number024015
JournalPhysical Review Applied
Issue number2
StatePublished - Aug 24 2015
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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