0.14 THz backward wave oscillator

The linear dispersion relation of SWSs driven by annular beam with finite magnetic field is obtained. Numerical analysis is carried out according to the experimental parameters. Based on the PIC simulation results obtained by KARAT, elementary experiment was designed and carried out, from which terahertz wave with frequency more than 0.14 THz, pulse duration 1～2 ns and output power more than 100 kW was acquired.