Title :
Suppression of higher-order modes in an RF cavity by resistive material
Author :
Koseki, Tadashi ; Izawa, Masaaki ; Kamiya, Yukihide
Author_Institution :
Inst. of Solid State Phys., Tokyo Univ., Japan
Abstract :
A new 500-MHz cavity which has a simple damped structure for the 1.5-GeV VUV ring will be presented in this paper. The feature of the cavity design is that higher-order modes (HOMs) propagate out from the cavity through the beam-duct with a large diameter and are absorbed in resistive parts in the duct. A low power measurement on a prototype model of the cavity has been carried out and the Q-values of HOMs are confirmed to be drastically reduced. Thus the coupled-bunch instabilities due to HOMs are expected to be sufficiently suppressed
Keywords :
beam handling equipment; cavity resonators; electron accelerators; storage rings; 1.5 GeV; 500 MHz; RF cavity; VUV ring; coupled-bunch instabilities; higher-order mode suppression; quality factor; resistive material; Acceleration; Conductivity; Impedance; Optical coupling; Particle beams; Production facilities; Prototypes; Radio frequency; Storage rings; Voltage;
Conference_Titel :
Particle Accelerator Conference, 1993., Proceedings of the 1993
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-1203-1
DOI :
10.1109/PAC.1993.308726
