Simulation of electron beam dynamics in a high-energy electron cooler

Electron cooling is now a standard tool for improvement of ion beam parameters in storage rings. In BINP, after successful development of several low-energy electron cooling devices, a project involving a high-energy electron cooler for GSI has been proposed. This cooler has a classical electrostatic scheme with electron energy of up to 8 MeV. Here we present results of numerical simulations of electron beam formation, acceleration and collection for this project. Special attention is paid to a description of the new codes developed in BINP. The electron gun and collector are simulated by the 2D USAM code. This code is modified to calculate collector performance with consideration of secondary emission. The BEAM code is used for simulation of dynamics in the accelerating section. A new 3D electrostatic code, ELEC3D, developed for the simulation of beam dynamics in bends with electrostatic compensation of the centrifugal drift, is described. This code is combined with the existing MAG3D magnetostatic code to provide a universal tool for 3D static calculations.