Title :
Energy recovery system for a W-band gyro-BWO
Author :
Zhang, L. ; He, W. ; Donaldson, C.R. ; Cross, A.W. ; Phelps, A.D.R. ; McElhinney, P. ; Ronald, K.
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) in 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 were simulated to investigate the effects of the secondary electrons on the overall recovery efficiency and the backstreaming of the electrons from the collector region.
Keywords :
backward wave oscillators; genetic algorithms; gyrotrons; secondary electron emission; 3D PIC code MAGIC; University of Strathclyde; W-band gyro-BWO; W-band gyrotron backward wave oscillator; energy recovery system; four-stage depressed collector; genetic algorithm; optimum overall recovery efficiency; secondary electron emissions; spent beam information; Electrodes; Electromagnetic heating; Electron beams; Geometry; Helium; Optimization; Trajectory;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2012 37th International Conference on
Conference_Location :
Wollongong, NSW
Print_ISBN :
978-1-4673-1598-2
Electronic_ISBN :
2162-2027
DOI :
10.1109/IRMMW-THz.2012.6380261
