Formation of electron beams in relativistic klystron two-stream amplifier

The relativistic two-stream amplifier (RTSA) is a kind of high power microwave device with simple geometrical structure and high efficiency. Its working mechanism is the two-stream instability between the two concentric circular beams, which propagates through the waveguide along the same direction. This two-stream instability generates the energy exchange between the electron beams. Pumped by the output cavity, the energy of electron beams generates the microwave power amplification. The microwave is input by the cavity of RTSA. It is critical issue to generate such two electron beams to be emitted into the waveguide. By using the MAGIC PIC simulation program. The formation of electron beams in RTSA is simulated and some of the key parameters is got. The results show that it is available