High-Brightness Continuous-Wave Electron Beams from Superconducting Radio-Frequency Photoemission Gun
Irina Petrushina, Vladimir Litvinenko, Y. Jing, Jun Ma, I. Pinayev, Kai Shih, G. Wang, Yuqi Wu, Z. Altinbas, J. C. Brutus, S. Belomestnykh, Anthony Di Lieto, Patrick Inacker, James Jamilkowski, G. Mahler, M. Mapes, Toby Miller, Gautham Narayan, Matthew Paniccia, T. Roser, F. Severino, J. Skaritka, L. Smart, Scott Smith, Victor Soria, Y. Than, J. Tuozzolo, E Wang, B. Xiao, Tianmu Xin, I. Ben‐Zvi, C. Boulware, Terry Grimm, Kentaro Mihara, D. Kayran, T. Rao
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.