Scientists from the NCBJ have been developing an innovative superconducting photocathode, that will allow the currently built Polish free-electron laser PolFEL to operate effectively in a continuous wave mode. This will allow distinguishing PolFEL from other such devices in the world. Detailed information was inclosed in the September issue of Vacuum magazine.

The entire publication can be found at: https://doi.org/10.1016/j.vacuum.2020.109524