Electron beam monochromatization in the linac used as an injector to the stretcher

The Kharkov electron linac is currently under reconstruction to be used as an injector for the stretcher ring. The expected energy decrease due to the beam load is 600 MeV at a pulsed current of 200 mA. Therefore, for the beam monochromatization, a combined system is being developed which includes a time-delay device, a compensating section, and an RF compressor at the exit of the linac. This system will permit the energy spread caused by the beam loading during the pulse and the accelerating field variations to be reduced from 600 MeV to 3 MeV. The proposed monochromatization scheme permits the beam loss to be practically avoided in the beam transport system and makes it possible to obtain a beam with an energy spread of 0.1% at the stretcher input