W-band gyro-BWO with a four-stage depressed collector

Research output: Contribution to journalArticle

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. The heat power distribution on the electrodes was also simulated to avoid the “hot spot”.
LanguageEnglish
Pages76-84
Number of pages9
JournalTerahertz Science & Technology
Volume4
Issue number3
DOIs
Publication statusPublished - Sep 2011

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backward waves
accumulators
recovery
oscillators
secondary emission
genetic algorithms
electron emission
heat
electrodes
geometry
electrons
simulation
energy

Keywords

  • gyro-BWO
  • depressed collector
  • energy recovery
  • secondary electron emission

Cite this

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title = "W-band gyro-BWO with a four-stage depressed collector",
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. The heat power distribution on the electrodes was also simulated to avoid the “hot spot”.",
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author = "Liang Zhang and Wenlong He and Donaldson, {Craig R.} and Cross, {Adrian W.} and Phelps, {Alan D.R.} and Paul McElhinney and Kevin Ronald",
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W-band gyro-BWO with a four-stage depressed collector. / Zhang, Liang; He, Wenlong; Donaldson, Craig R.; Cross, Adrian W.; Phelps, Alan D.R.; McElhinney, Paul; Ronald, Kevin.

In: Terahertz Science & Technology, Vol. 4, No. 3, 09.2011, p. 76-84.

Research output: Contribution to journalArticle

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AU - Zhang, Liang

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AU - Ronald, Kevin

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