Impedance calculation with URMEL-I using multigrid methods

Author

Van Rienen, Ursula ; Weiland, Thonias

Author_Institution

Desy, Hamburg, West Germany

Volume

26

Issue

2

fYear

1990

fDate

3/1/1990 12:00:00 AM

Firstpage

743

Lastpage

746

Abstract

A description is given of the computer code URMEL-I which calculates the impedance of cylindrically symmetric obstacles of arbitrary shape with open side tubes. This code is specifically designed for the impedance calculation above cutoff where existing resonator codes cannot be used. The numerical solution is based on the FFT (finite Fourier transform) method, a finite-difference method. It requires the solution of a large, inhomogeneous, complex matrix equation for a given frequency. A multigrid algorithm has been set up to solve the linear system which is non-Hermitian and indefinite. The special solver is described, and results for different resonators are presented

Keywords

cavity resonators; difference equations; electric impedance; electrical engineering computing; fast Fourier transforms; numerical methods; cavity resonators; computer code URMEL-I; cylindrically symmetric obstacles; finite Fourier transform; finite-difference method; impedance calculation; linear system; matrix equation; multigrid algorithm; numerical solution; open side tubes; resonator codes; Boundary conditions; Cutoff frequency; Finite difference methods; Impedance; Magnetic fields; Multigrid methods; Q factor; Resonance; Resonant frequency; Shape;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.106425

Filename

106425