Steering and focusing effects in TESLA cavity due to high order mode and input couplers
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.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76CH03000
- OSTI ID:
- 15017052
- Report Number(s):
- FERMILAB-CONF-05-173-AD; TRN: US200606%%301
- Resource Relation:
- Conference: To appear in the proceedings of Particle Accelerator Conference (PAC 05), Knoxville, Tennessee, 16-20 May 2005
- Country of Publication:
- United States
- Language:
- English
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