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- W2108024089 abstract "Recent results are presented for the linear field analysis of the coupled beam-wave system for the traveling wave tube (TWT) and numerical techniques for TWT design. The basic model includes an electron beam of constant current density located inside the helix. The helix is loaded externally by lossy dielectric material, a conducting shell and vanes for dispersion modification. The model is further divided into axial regions which may include severs, lossy materials, or circuit velocity steps, with the helix geometry varied arbitrarily in each region. The backward-wave root of the coupled dispersion equation is discarded and the sum of the fields for the three forward waves is followed to the circuit output. The dispersion equations are expressed in terms of equating admittance functions at radial boundaries. The numerical procedures to solve the dispersion equations will be described. Results obtained using the field analysis will be compared with those from the conventional coupled-mode Pierce theory for the same geometry. The issue of weak (Brillouin) vs. strong focusing will be discussed and recent refinements to the field theory will be described." @default.
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- W2108024089 date "2005-08-24" @default.
- W2108024089 modified "2023-09-26" @default.
- W2108024089 title "Field Analysis Of Helix Traveling Wave Tube Interaction" @default.
- W2108024089 doi "https://doi.org/10.1109/plasma.1994.589040" @default.
- W2108024089 hasPublicationYear "2005" @default.
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