A high-intensity electron-beam source

A description is given and calculation results are presented for a high-intensity electron-beam source that can produce sequences of four electron bunches of 1 nC each, following at a frequency of 50 Hz. The root-mean-square normalized transverse beam emittance of the bunch does not exceed 4 mm mrad, the root-mean-square duration is 3 ps, and the energy can be adjusted in the 35–50 MeV range.