Title :
A four-stage depressed collector for a W-band gyro-BWO
Author :
Zhang, Liang ; He, Wenlong ; Donaldson, Craig R. ; Cross, Adrian W. ; Phelps, Alan D R ; Ronald, Kevin
Author_Institution :
Dept. of Phys., Univ. of Strathclyde, Glasgow, UK
Abstract :
An energy recovery system using a four-stage depressed collector was simulated and designed to improve the overall efficiency of the W-band gyrotron backward wave oscillator (gyro-BWO) at the University of Strathclyde. The spent beam information was exported from the simulation of the gyro-BWO using the 3D PIC code MAGIC. The geometry of the depressed collector was optimized using a genetic algorithm to achieve the optimum overall recovery efficiency for specific parameters of the spent beam. Secondary electron emissions and their effects on the recovery efficiency and the backstreaming of the electrons from the collector region were simulated.
Keywords :
backward wave oscillators; genetic algorithms; geometry; gyrotrons; secondary electron emission; 3D PIC code MAGIC; W-band gyro-BWO; W-band gyrotron backward wave oscillator; electron backstreaming; energy recovery system; four-stage depressed collector geometry; genetic algorithm; optimum overall recovery efficiency; secondary electron emission; spent beam information; Electric potential; Electrodes; Electromagnetic heating; Electron beams; Helium; Kinetic energy;
Conference_Titel :
Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 2011 36th International Conference on
Conference_Location :
Houston, TX
Print_ISBN :
978-1-4577-0510-6
Electronic_ISBN :
2162-2027
DOI :
10.1109/irmmw-THz.2011.6104929
