In a recirculating accelerator, the beam quality, stability and, above all, the pulse blur can be optimized by cleverly choosing the phase with which the electron bunches hit the high-frequency accelerator and the correspondingly set energy-dependent time of flight in the recirculation (longitudinal dispersion). In this process, the arcs of the three recirculations on the S-DALINAC are adjusted to achieve the desired values of longitudinal dispersion. The up to four beams in the main accelerator are set in a defined way on the flank of the high-frequency field. During the simulations, given boundary conditions such as defined momentum ratios between the different paths have to be considered as well as the adjustment possibilities due to the given beam diagnostics.

Within the scope of this master thesis, phase landscapes shall be simulated, which represent the different adjustment possibilities of the phases and longitudinal dispersions. Results and experiences of the last beam settings will be used as additional information. The stability of the obtained settings will be investigated.