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Steering and Focusing Effects in TESLA Cavity Due to High Order Mode and Input Couplers

S. G. WipfM. MarxP. PiotM. DohlusK. Flottmann

出版	United States. Department of Energy, 2005
URL	http://books.google.com.hk/books?id=Lx-7jwEACAAJ&hl=&source=gbs_api

註釋

Many state-of-art electron accelerator proposals incorporate TESLA-type superconducting radio-frequency (rf) cavities [1]. These standing wave rf cavities include rf input couplers and a pair of high order mode (HOM) couplers to absorb the energy associated to HOM field excited as the bunch passes through the cavity. In the present paper we investigate, using numerical simulations, the impact of the input and HOM couplers on the beam dynamics to zeroth and first order in initial position, and present parametric studies of the strength of these effects for various incoming beam energies. We finally study the impact of this asymmetric field on the beam dynamics, taking as an example the low energy section of the X-ray FEL injector.