Near atomically smooth alkali antimonide photocathode thin films

Abstract

Nano-roughness limits the emittance of electron beams that can be generated by high efficiency photocathodes, such as the thermally reacted alkali antimonide thin films. However there is an urgent need for photocathodes that can produce an order of magnitude or more lower emittance than present day systems in order to increase the transverse coherence width of the electron beam. In this paper we demonstrate a method for producing alkali antimonide cathodes with near atomic smoothness with high reproducibility.

References in corpus (3)

• Thermal emittance measurements of a cesium potassium antimonide photocathode
• Cold electron beams from cryo-cooled, alkali antimonide photocathodes
• Effect of nano-scale surface roughness on transverse energy spread from GaAs photocathodes

Cited by in corpus (9)

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• A single-crystal alkali antimonide photocathode: high efficiency in the ultra-thin limit
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• Nano-machining, surface analysis and emittance measurements of a copper photocathode at SPARC_LAB
• Atomically smooth films of CsSb: a chemically robust visible light photocathode
• Optical Near-Field Electron Microscopy
• Quantum efficiency enhancement of bialkali photocathodes by an atomically thin layer on substrates
• Stability and electronic properties of CsK${}_2$Sb surface facets
• Rapid thermal emittance and quantum efficiency mapping of a cesium telluride cathode in an rf photoinjector using multiple laser beamlets