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High-Brightness Continuous-Wave Electron Beams from Superconducting Radio-Frequency Photoemission Gun
I Petrushina1,2, V N Litvinenko1,2, Y Jing1,2
1Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794, USA.
Abstract:
Continuous-wave photoinjectors operating at high accelerating gradients promise to revolutionize many areas of science and applications. They can establish the basis for a new generation of monochromatic x-ray free electron lasers, high-brightness hadron beams, or a new generation of microchip production. In this Letter we report on the record-performing superconducting rf electron gun with CsK_{2}Sb photocathode. The gun is generating high charge electron bunches (up to 10 nC/bunch) and low transverse emittances, while operating for months with a single photocathode. This achievement opens a new era in generating high-power beams with a very high average brightness.
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