Title :
Scaling relations for a beam-deflecting TM110 mode in an asymmetric cavity
Author_Institution :
Los Alamos Nat. Lab., NM, USA
Abstract :
A deflecting mode in an RF cavity caused by an aperture of the coupling hole from a waveguide is studied. If the coupling hole has a finite size, the RF modes in the cavity can be distorted. The distorted mode is considered as a sum of the accelerating mode and the deflecting mode. The finite-size coupling hole can be considered as radiating dipole sources in a closed cavity. Following the prescription given by H. Bethe (1944), the relative strength of the deflecting mode TM110 to the accelerating TM010 mode is calculated by decomposing the dipole source field into cavity eigenmodes. Scaling relations are obtained as a function of the coupling hole radius
Keywords :
beam handling equipment; particle beam diagnostics; RF cavity; RF modes; accelerating mode; asymmetric cavity; beam-deflecting TM110 mode; cavity eigenmodes; closed cavity; coupling hole; deflecting mode; dipole source field; distorted mode; radiating dipole sources; scaling relations; Acceleration; Apertures; Current distribution; Equations; Laboratories; Magnetic analysis; Optical coupling; Radio frequency; Rectangular waveguides; Waveguide theory;
Conference_Titel :
Particle Accelerator Conference, 1989. Accelerator Science and Technology., Proceedings of the 1989 IEEE
Conference_Location :
Chicago, IL
DOI :
10.1109/PAC.1989.73263
