PIC Simulation of The Rectangular Grating with Single Electron Beam for 0.3THz BWO

In order to improve the beam interaction efficiency and output power of the terahertz backward wave oscillator (BWO), a pre-bunching idea is proposed in this paper, that is, a rectangular grating slow-wave structure with drift segments. The structure can enhance the interaction between the beam and the wave, resulting in higher output power. For the slow-wave structure, the particle-in-cell is simulated. And the output power of 43.8W is obtained, the working voltage is 23.8kV, the beam current is 50mA and the conductivity is set to 1.6×10
⁷
S/m.