Self-consistent large-signal calculation on the gyrotron-TWA

By means of a ballistic method a self-consistent large-signal calculation on the gyrotron traveling wave amplifier (gyrotron-TWA) with uniform waveguide and magnetic field has been accomplished. The theory is valid for arbitrary harmonics of the cyclotron frequency and arbitrary TEmn modes. Computer simulation shows that under defined conditions a beam efficiency ∼50 %, an output power ≳300 kW and a gain∼28 dB at a central frequency of 35 GHz with a 3 dB bandwidth of 2,7 % could be obtained. This method will be effective for the theoretical analysis and the parameter-optimization on the gyrotron-TWA.