RECENT STUDIES OF BEAM PHYSICS FOR ION LINACS

Abstract

The UNIversal Linear ACcelerator (UNILAC) at GSI aims at provision of high brilliant heavy ion beams, as its main purpose will be to serve as injector for the upcoming FAIR accelerator complex. To keep acceleration efficient, heavy ions need to be charge state stripped and progress in improving this process is reported. Recent advance in modeling time-transition-factors and its impact on simulation of longitudinal dynamics is presented. The UNILAC injects into the subsequent synchrotron SIS18 applying horizontal multi-turn injection (MTI). Optimization of this process triggered intense theoretical and experimental studies of the dynamics of transversely coupled beams. These activities comprise full 4d transverse beam diagnostics, round-to-flat beam transformation, extension of Busch’s theorem to accelerated particle beams, and optimization of the MTI parameters through generic algorithms.