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We report progress in the development of a 2D large-signal simulation code based on the use of modes of the impedance matrix that characterizes the slow-wave structure. We apply linear network approach in which input/output and interaction gaps are described as parts in a network. Finite element EM code is used to compute the frequency dependent impedance matrix of the network. The impedance matrix...
We describe a new formulation for the electromagnetic fields in an arbitrary slow wave structure that can be used in the 2D large-signal modeling of beam-wave interaction. The main idea is to represent fields in the portions of the structure not occupied by the beam as a superposition of whole structure modes. This approach generalizes that based on circuit models, such as the Curnow model. Our plans...
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