Optimal Design of an Undepressed Collector for a Ka-Band Gyro-klystron

The collector plays a significant role in the gyroklystron as it determines the power capacity of the whole tube. The conventional cylindrical collector has limited power capacity due to the concentrated dissipated power, therefore the improved Genetic Algorithm is adopted to optimize the curved collector to increase power capacity and make distribution of dissipated power more uniformly. The maximum dissipated power of curved collector is reduced from 1.115kW/cm(2) to 0.421kW/cm(2), and the maximum temperature is reduced from 233.02 degrees C to 143.28 degrees C The fitness function reduction is 42.7% after 100 iterations. It shows that the curved collector increases power capacity and improved Genetic Algorithm has high optimization efficiency.