The first energy spread measurement of electron beam produced by MPG

This paper presents the energy spread measurement result of electron beam produced by MPG, which is obtained for the first time. The operation parameters and the experimental result are reported. The average current density of 1.8 mA was obtained at 2.856 GHz. The energy spread of the electron beam is also measured, in which the energy of the most electrons is less than 50 eV and the FHWM is less than 15 eV. The fifth order operation mode is obtained.