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Regular version of the site

Article

Optimization of a Sheet Electron Beam Interaction With a Slow Wave

IEEE Transactions on Electron Devices. 2014. Vol. 61. No. 6. P. 1661-1665.

The TWT model based on placed in parallel impedance electrodes is used to analyze effectiveness of a sheet e-beam interaction with the in-phase mode of a slow wave excited in the impedance electrodes. The impedance approximation was used for presentation fields of E- and H-waves by zero and ±1 space harmonics, respectively. The generalized formula for the coupling coefficient, characterizing the interaction effectiveness, was used to demonstrate the its dependence on the e-beam thickness and the gaps between the impedance and screen electrodes. The obtained dependences on the e-beam tunnel geometry and the operating frequency were compared with that calculated for a cylindrical beam in a conventional helix.