IRES, a code to evaluate the beamlet-beamlet interaction for the multi-aperture electrostatic accelerators

The beamlet-beamlet interaction is an important process which has an important impact on the design of the grids for a multi-aperture electrostatic accelerator. Charge effect leads to beamlet deflection then increasing the divergence of the whole beamlet group. According to the beamlet deflection, the grid apertures have to be properly aligned in order to provide the correct aiming of the beamlets and to avoid excessive thermal load on the grids. Even though commercial numerical codes are presently available to address this problem, in order to reduce the calculation time and to increase flexibility, a new tool called IRES (Ion Relativistic Equation Solver) has been developed in Matlabreg to simulate the 3D trajectories of a whole group of beamlets by integrating the relativistic equation of motion.