Status of ELBE radio frequency system

The radiation source ELBE is based on a superconducting linear accelerator that can be operated in high average power mode (quasi continous wave mode, cw). Electrons are preaccelerated in a 250 keV-thermionic DC electron-gun and prebunched in a two stage RF-buncher section. Main acceleration is accompished in two 20 MeV-superconducting linear accelerator modules operating at 1,3 GHz which are cooled with liquid helium. The RF-power comes from 10 kW clystrons controled by the low level RF-system.