Barrier bucket and transversely split beams for loss-free multi-turn extraction in synchrotronsM. Vadai, A. Alomainy, H. Damerau, S. Gilardoni, M. Giovannozzi and A. HuschauerEPL, 128 1 (2019) 14002DOI: https://doi.org/10.1209/0295-5075/128/14002