Quasi regenerative amplifier of high energy output

Quasi regenerative amplifier is put forward, which is based on the improvement upon the regenerative amplifier. In the amplifying system, the large-aperture amplifiers are used and the beam is imaged in the amplifier to keep the shape of the beam in the course of amplifying. Experiments on the feasibility of this amplifying concept show that this kind of amplifying system even based on low-gain amplifiers can achieve high system gain and can output high-energy pulses. (authors)