The numerical analysis of higher-order modes for superconducting rf cavity at SRRC

Author

Chou, P.J.

Author_Institution

Synchrotron Radiat. Res. Center, Hsinchu, Taiwan

Volume

2

fYear

2003

fDate

12-16 May 2003

Firstpage

1368

Abstract

The beam current in the storage ring at Taiwan Light Source (TLS) is limited by the longitudinal coupled-bunch instabilities and the available rf power. Two Doris cavities are currently used for particle acceleration in the storage ring at TLS. The higher-order modes (HOMs) from Doris cavities are the major source of longitudinal impedance in the storage ring at TLS. In order to increase the electron beam current in the storage ring, a superconducting (SC) rf cavity developed by Cornell University will be installed to replace those two Doris cavities. The property of HOMs of SC rf cavity is obtained from numerical simulations by using a three-dimensional parallel code GdfidL. The preliminary results show that the storage ring at TLS will not suffer from the longitudinal coupled-bunch instabilities for a beam current not exceeding 450 mA.

Keywords

accelerator RF systems; accelerator cavities; electron accelerators; electron beams; numerical analysis; particle beam bunching; particle beam dynamics; particle beam stability; storage rings; superconducting cavity resonators; Doris cavities; SRRC; electron beam current; higher-order modes; longitudinal coupled-bunch instabilities; longitudinal impedance; numerical simulations; rf power; storage ring; superconducting rf cavity; three-dimensional parallel code GdfidL; Damping; Impedance; Linear particle accelerator; Numerical analysis; Numerical simulation; Optical coupling; Particle beams; Radio frequency; Storage rings; Synchrotron radiation;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the

ISSN

1063-3928

Print_ISBN

0-7803-7738-9

Type

conf

DOI

10.1109/PAC.2003.1289708

Filename

1289708