Design of an Energy Recovery System for a Gyrotron Backward-Wave Oscillator

作者：Zhang Liang^*; He Wenlong; Cross Adrian W; Phelps Alan D R; Ronald Kevin; Whyte Colin G

来源：IEEE Transactions on Plasma Science, 2009, 37(3): 390-394.

DOI：10.1109/TPS.2008.2012108

• Depressed collector
• energy recovery
• genetic algorithm
• gyrotron backward-wave oscillator (gyro-BWO)

To realize the full potential of a gyrotron backward-wave oscillator (gyro-BWO), an energy recovery system was designed using Particle-In-Cell (PIC) simulations and optimized using both a genetic algorithm and PIC simulations. Simulations were carried out to optimize a periodic structure for separation of the spent electron beam and the output radiation produced by a gyro-BWO in the 8.0-9.5 GHz frequency range. The spent electron beam can be collected using a multistage depressed collector. The number and electric potentials of the electrodes were optimized to achieve the best overall recovery efficiency for specific parameters of the spent beam. The 3-D PIC code MAGIC was used to simulate the electrons' trajectories and a genetic algorithm was used to refine the electrode shapes for optimum efficiency.

• 出版日期2009-3