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Description
The Ultimate Source of Synchrotron Radiation (USSR) being developed at the NRC «Kurchatov Institute» will include 6 GeV storage ring with 7BA lattice which will allow to obtain a transverse emittance value of about 50 pm rad and a free electron laser. One linear accelerator for full energy is considered as the main top-up injector into the storage ring and as a driver of high-brightness bunches for FEL. A S-band RF-gun with photocathode based on 3.6-cells π-mode standing wave accelerating structure at operating frequency 2.8 GHz will be used for a high brightness bunch train generation. In this report the general concept of the RF-photogun is presented. An optimization of beam dynamics, electrodynamics properties, fields distribution in the resonator and coaxial RF-coupler were done. Thermal processes in structure waere studied and cooling system design was performed.
