Title :
Impedance calculation with URMEL-I using multigrid methods
Author :
Van Rienen, Ursula ; Weiland, Thonias
Author_Institution :
Desy, Hamburg, West Germany
fDate :
3/1/1990 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
