• Volkov, V.; Knobloch, J.; Matveenko, A.: Beam Breakup Instability Suppression in Multi Cell SRF Guns. In: Proceedings SRF 2009, 14th International Conference on RF Superconductivity, DBB Forum, Berlin September 20 - 25, 2009Berlin: Helmholtz-Zentrum, 2009 (HZB-Bericht 2), p. 876-879


Abstract:
Beam breakup (BBU) instability analysis in superconducting multi cell cavities [1] is extended to FZD like RF guns. Also, the BBU instability was studied numerically on the basis of the dipole HOM analysis and transverse beam dynamics. An effective way to suppress the BBU instability using TE mode RF focusing is presented and proved to be technically feasible. In that way, multi cell SC cavities in powerful RF guns with stable high currents are found to be realistic.