• Ries, M.; Feikes, J.; Jankowiak, A.; Schmid, P.; Wüstefeld, G.: SIMULTANEOUS LONG AND SHORT BUNCH OPERATION IN AN ELECTRON STORAGE RING - A HYBRID MODE BASED ON NONLINEAR MOMENTUM COMPACTION. In: Proceedings of IPAC2011, 4 - 9 September 2011, San Sebastián, Spain, 2011, p. 945-947


Abstract:
The generation of short pulses in electron storage rings is motivated by users interested in time resolved X-ray spectroscopy or coherent synchrotron radiation. The required optics and operation conditions to generate this short bunches are reducing the average photon flux for the regular user. Therefore short bunch operation is usually limited to dedicated user shifts. By controlling higher orders of the momentum compaction factor α by higher order magnetic multipoles it is possible to introduce a hybrid mode and simultaneously supply long and short bunches [1]. The Metrology Light Source (MLS) has the means to control α = α0 + α1δ + α2δ2 [2], therefore it is an ideal machine to investigate the feasibility of such a hybrid mode. First measurements will be shown.