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GdfidL: a finite difference program for arbitrarily small perturbations in rectangular geometries

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1 Author(s)
Bruns, W. ; Inst. fur Theor. Elektrotech., Tech. Univ. Berlin, Germany

A FD-program for calculating the resonant fields in a perturbed chain of rectangular cavities is presented. The unperturbed cavity chain can be discretized exactly by standard FD-programs that operate on regular grids. Discretizing a perturbed chain exactly with such a grid would lead to a computation time inversely proportional to the perturbation. GdfidL does not represent the grid as a matrix but as a linked list. This allows discretizing arbitrarily small perturbations of a certain class without increasing the time for the solution. As a nice side-effect, only interesting volumes are discretized, reducing the computation time further

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Magnetics, IEEE Transactions on  (Volume:32 ,  Issue: 3 )