Abstract- Gain Analysis of a 0.2-THz Traveling-Wave Tube With Sheet Electron Beam and Staggered Grating Slow Wave Structure

 Tatiana A. Karetnikova,  Andrey G. Rozhnev,  Nikita M. Ryskin,  Alexey E. Fedotov,  Sergey V. Mishakin,  Naum S. Ginzburg,

http://ieeexplore.ieee.org/document/8252742/

Results of numerical simulation of a miniaturized sub-THz traveling-wave tube amplifier with sheet electron beam and planar grating slow wave structure (SWS) are presented. Cold characteristics of the SWS are calculated. Small-signal and large-signal gain regimes are studied by the 1-D parametric frequency-domain code. The results are verified by simulations using 3-D particle-in-cell codes.

Abstract- Development of electron-optical system with three elliptic electron beams for a THz-band vacuum-tube device

 Igor A. Navrotsky ;  Anton A. Burtsev, Alexander Y. Kivokurtsev,  Kirill V. Shumikhin,  Pavel D. Shalaev,   Tatiana A. Karetnikova,  Nikita M Ryskin,

http://ieeexplore.ieee.org/document/8068467/

The results of design, simulation, and experimental testing of an electron-optical system with three elliptic electron beams are presented. Total beam current is 93 mA. The beams are focused by a PPM system with 0.55 T magnitude of the magnetic field. Beam transmission in a rectangular tunnel at over 25 mm distance is demonstrated. The developed electron optical system is assumed to be used in sub-THz-band vacuum-tube devices such as O-type traveling-wave tube or backward-wave oscillator. Electromagnetic parameters of a double-grating staggered slow-wave structure are calculated.