Design and preliminary experimental study of X-band short pulse relativistic backward wave oscillator

An optimized X-band relativistic backward wave oscillator (RBWO) based on superradiance mechanism of short electron beam was designed and simulated numerically. The simulation results indicate that the RBWO can realize microwave radiation with high peak power and high power conversion efficiency under superradiace mechanism. A small narrow pulse electron accelerator is build based on a compact Tesla pulse source along with design of a resistance conversion section, a diode and a magnetic system. The preliminary experiment was performed at low magnetic field condition. For guiding magnetic field 0.73 T, beam voltage 380 kV, beam current 4.5 kA and pulse width 3.1 ns, microwave pulses with about 360 MW peak power, 1.10 ns pulse width and 800 ps risetime were generated, and the conversion eff