STATUS OF A 2-MeV CW RF INJECTOR FOR THE NOVOSIBIRSK HIGH-POWER FEL

A 2-MeV injector for the Novosibirsk high power free electron laser is described. It consists of a 300 keV electron gun, one bunching and two accelerating RF cavities with RF generators, a vacuum system, a magnetic system and a beam dump. The electron gun uses a gridded cathode and provides an electron beam with average current 55 mA, repetition rate 22.5 MHz and peak current 2.3 A. The RF system operates at 180 MHz frequency. The CW RF power supply provides up to 260 kW output power. The injector will serve as the beam source for the accelerator-recuperator of the high power free electron laser, which is under construction in Novosibirsk now.