Title :
Measurement and identification of HOMs in RF cavities
Author :
Goldberg, D.A. ; Rimmer, R.A.
Author_Institution :
Lawrence Berkeley Lab., CA, USA
Abstract :
One of the major sources of beam impedance in accelerators is the higher-order modes (HOMs) of the RF cavities. We report on a number of techniques for the identification of HOMs and measurement of their properties. Central to these techniques is the application of symmetry principles and the effects of symmetry-breaking perturbations (including mode-mixing) to the “standard” techniques of spectrum measurements and bead pulls
Keywords :
accelerator RF systems; accelerator cavities; symmetry; HOM; RF cavities; bead pulls; beam impedance; higher-order modes; mode-mixing; spectrum measurements; symmetry; symmetry-breaking perturbations; Antenna measurements; Apertures; Frequency measurement; Impedance; Magnetic field measurement; Needles; Probes; Prototypes; Radio frequency; Radiofrequency identification;
Conference_Titel :
Particle Accelerator Conference, 1997. Proceedings of the 1997
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-4376-X
DOI :
10.1109/PAC.1997.753088
