Abstract
A relativistic backward wave oscillator (RBWO) operating in dual (C and X) band is designed and studied using finite-difference time domain (FDTD) particle-in-cell (PIC) simulations implemented in MAGIC. It consists of a sinusoidally corrugated, moderately overmoded nonuniform slow wave structure (SWS) in the downstream section and a single fold two-way helically corrugated Bragg structure in the upstream section. A single intense relativistic electron beam (IREB) having ~5.1 kA of current is predicted for 600 kV of diode voltage. An RF output power ~720 MW in X-band and ~510 MW in C-band are predicted in TE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11</sub> mode with a guiding magnetic field of ~2.5 T.
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