Beam dynamics investigations accompanying the FLUTE facility upgrade

The Ferninfrarot Linac- und Test-Experiment (FLUTE) facility at the Karlsruhe Institute of Technology (KIT) is designed to deliver ultra-short electron bunches offering a broad range of beam parameters for diverse applications and to provide coherent radiation in light pulses spanning the terahertz and far-infrared spectral range. Beyond its current role as a versatile accelerator test facility, FLUTE is intended to become one of the injectors for the Very Large Acceptance-compact Storage Ring (VLA-cSR), presently under construction at KIT within the cSTART project (compact Storage Ring for Accelerator Research and Technology). To fulfill this future roles, FLUTE will undergo a reconstruction and a partial upgrade during the cSTART construction phase. This contribution outlines the planned modifications to the future FLUTE accelerator test facility and presents results from accompanying beam dynamics simulations.