John Smedley

TL;DR: In this paper, the requirements and current status of cathodes for accelerator applications are reviewed and a research and development plan for advancing cathode technology is proposed, and the thermal emittance is derived and formulas used to compare the various cathode materials.

TL;DR: In this paper, a hydrogen ion (H-ion) beam was used to clean a copper cathode, and the measured work function for the cleaned sample is in good agreement with published values, and theoretical QE as a function of photon wavelength is in excellent agreement with the cleaned copper experimental results.

TL;DR: In this paper, an overview of existing and emerging technologies on electron sources that can service various energy recovering linacs under consideration Photocathodes that can deliver average currents from 1 mA to 1 A, the pros and cons associated with these cathodes are addressed status of emerging technologies such as secondary emitters, cesiated dispenser cathodes, field and photon assisted field emitters and super lattice photocathodes are also reviewed.

TL;DR: In this article, the authors describe the development of photocathodes based on potassium-cesium-antimonide that satisfy many of the key requirements of future light sources, such as robustness, high quantum efficiency when excited with visible light, and low transverse emittance.

TL;DR: Alkali-antimonide photocathodes were grown on Si(100) and studied by means of XPS and UHV-AFM to validate the growth procedure and morphology of this material as discussed by the authors.