摘 要: | This paper starts from the kinetic theory to expound the method of characteristics.Influenceof the equilibrium distribution function fo upon analyzed result is fully investigated.The dispersionequation is regorously derived in a waveguide coordinate system in case of interaction between TE_(mn)field in a circular waveguide and a single-momentum ring-shaped electron beam.In the meantime,we make some critical review of previous papers and clarify their confusion and ambiguities.
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