Beam impedance calculation and analysis of higher order modes (HOMs) damped RF cavities using MAFIA in time domain

Author

Li, Derun ; Rimmer, Robert A.

Author_Institution

Lawrence Berkeley Nat. Lab., CA, USA

Volume

2

fYear

2001

fDate

2001

Firstpage

915

Abstract

A time domain method using MAFIA code has been developed to calculate narrow band beam impedance in RF cavities over a wide range of frequency spectrum. The impedance is obtained through Fast Fourier Transformation (FFT) of computed wakefields by the MAFIA. Analysis of the calculated impedance spectrum will be presented. Application of the method to a known RF cavity design (PEP-II cavity) has shown good agreements with bench and beam measurements. The method has been applied to the RF cavity design of of Damping Rings for Next Linear Collider (NLC)

Keywords

accelerator cavities; electron accelerators; fast Fourier transforms; linear colliders; particle beam dynamics; physics computing; time-domain analysis; MAFIA code; NLC; Next Linear Collider damping rings; PEP-II cavity; RF cavities; fast Fourier transformation; impedance spectrum; narrow band beam impedance; time domain method; wakefields; Boundary conditions; Colliding beam devices; Damping; Frequency domain analysis; Impedance; Light sources; Narrowband; Optical coupling; Radio frequency; Surface resistance;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001

Conference_Location

Chicago, IL

Print_ISBN

0-7803-7191-7

Type

conf

DOI

10.1109/PAC.2001.986523

Filename

986523