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

fYear

2011

fDate

2-7 Oct. 2011

Firstpage

1

Lastpage

2

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 2011 36th International Conference on

Conference_Location

Houston, TX

ISSN

2162-2027

Print_ISBN

978-1-4577-0510-6

Electronic_ISBN

2162-2027

Type

conf

DOI

10.1109/irmmw-THz.2011.6104929

Filename

6104929