HIGHER-ORDER MODES IN THE BELL-SHAPED SINGLE-CELL CAVITY OF THE SPRING-8 STORAGE-RING

Authors
EGO H HARA M KAWASHIMA Y OHASHI Y OHSHIMA T SUZUKI H TAKESHITA I YONEHARA H
Citation
H. Ego et al., HIGHER-ORDER MODES IN THE BELL-SHAPED SINGLE-CELL CAVITY OF THE SPRING-8 STORAGE-RING, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 383(2-3), 1996, pp. 325-336
Citations number
11
Categorie Soggetti
Nuclear Sciences & Tecnology","Physics, Particles & Fields","Instument & Instrumentation",Spectroscopy
Journal title
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment → ACNP
ISSN journal
01689002
Volume
383
Issue
2-3
Year of publication
1996
Pages
325 - 336
Database
ISI
SICI code
0168-9002(1996)383:2-3<325:HMITBS>2.0.ZU;2-L
Abstract
A single-cell cavity with a bell-shaped inner structure is designed fo r the SPring-8 storage ring so that the transverse or longitudinal shu nt impedances associated with higher-order mode resonances driving cou pled-bunch instabilities are low; the highest transverse shunt impedan ce of the dipole higher-order mode at 1077 MHz is 13.7 M Omega/m and t he highest longitudinal shunt impedance of the monopole higher-order m ode at 904 MHz is 2.8 M Omega. The shunt impedance of the accelerating TM010-like mode is 6.7 M Omega. The RF characteristics such as resona nt frequency, e-value, shunt impedance and electromagnetic field distr ibution of the higher-order modes in a model RF cavity were measured.