Application of three families of sextupoles at the KARA ring of Karlsruhe Institute of Technology

A third family of sextupole magnets was recently in-corporated at the KIT storage ring KARA (Karlsruhe Research Accelerator). Computer studies of beam dy-namics were performed with an objective to estimate benefits of operation with three sextupole families and possibility of new configuration of ring lattice to con-trol slope and curvature of momentum compaction factor as function of energy offset of particles in a bunch. Adjustment of high order terms of alpha would allow to shorten bunch further down. Simulations of KARA ring model have been bench-marked on exist-ing experiments at Metrology Light Source (MLS) in Berlin (Germany) and SOLEIL (France).