Simulation of a four-stage depressed collector for a W-band Gyro-BWO

Author

Zhang, Liang ; He, Wenlong ; Cross, Adrian W. ; Phelps, Alan D R ; Donaldson, Craig ; Ronald, Kevin

Author_Institution

Dept. of Phys., Univ. of Strathclyde, Glasgow, UK

fYear

2010

fDate

5-10 Sept. 2010

Firstpage

1

Lastpage

2

Abstract

To improve the overall efficiency of the W-band gyrotron backward wave oscillator (gyro-BWO) currently being built in the University of Strathclyde, an energy recovery system using a four-stage depressed collector was simulated and designed. 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; 3D PIC code; MAGIC; 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; Electric potential; Electrodes; Electromagnetic heating; Electron beams; Helium; Kinetic energy;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared Millimeter and Terahertz Waves (IRMMW-THz), 2010 35th International Conference on

Conference_Location

Rome

Print_ISBN

978-1-4244-6655-9

Type

conf

DOI

10.1109/ICIMW.2010.5612611

Filename

5612611