Simulation of high power broadband cyclotron autoresonance maser amplifier and electron beam experiments

David Speirs, A.D.R. Phelps, I.V. Konoplev, A.W. Cross, W. He

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The design, simulation, and preliminary experimental implementation of an efficient, broadband cyclotron autoresonance maser (CARM) amplifier operating over the 9-13 GHz frequency band is presented. The amplifier is based on a high current accelerator capable of generating a ~35 A pencil electron beam at an accelerating voltage of ~450 kV. A full three-dimensional numerical model of the CARM amplifier has been constructed within the particle-in-cell code KARAT taking into account electron beam parameters derived from simulation and experiment. An electron beam current of 32A at an accelerating voltage of 400 kV was measured. Numerical simulations demonstrate the possibility of obtaining 37 dB gain and an interaction efficiency of 17%. In addition a viable amplification bandwidth of 9-13 GHz is apparent, with a minimum gain and efficiency of 25 dB and 10%, respectively, at the boundaries of the amplification band. The peak modeled efficiency and gain (17%, 37 dB) were obtained at a frequency of 12 GHz. Computational simulations have also revealed correlation between the instantaneous amplification bandwidth and the spectral width of cyclotron superradiant emission within the system.
LanguageEnglish
Pages826-831
Number of pages5
JournalReview of Scientific Instruments
Volume75
Issue number4
DOIs
Publication statusPublished - Apr 2004

Fingerprint

Masers
Cyclotrons
masers
cyclotrons
Amplification
Electron beams
amplifiers
electron beams
broadband
Bandwidth
simulation
Experiments
Electric potential
Frequency bands
Particle accelerators
Numerical models
Cells
bandwidth
pencil beams
Computer simulation

Keywords

  • efficiency enhancement
  • magnetic-field
  • operation
  • gyrotrons
  • plasma

Cite this

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title = "Simulation of high power broadband cyclotron autoresonance maser amplifier and electron beam experiments",
abstract = "The design, simulation, and preliminary experimental implementation of an efficient, broadband cyclotron autoresonance maser (CARM) amplifier operating over the 9-13 GHz frequency band is presented. The amplifier is based on a high current accelerator capable of generating a ~35 A pencil electron beam at an accelerating voltage of ~450 kV. A full three-dimensional numerical model of the CARM amplifier has been constructed within the particle-in-cell code KARAT taking into account electron beam parameters derived from simulation and experiment. An electron beam current of 32A at an accelerating voltage of 400 kV was measured. Numerical simulations demonstrate the possibility of obtaining 37 dB gain and an interaction efficiency of 17{\%}. In addition a viable amplification bandwidth of 9-13 GHz is apparent, with a minimum gain and efficiency of 25 dB and 10{\%}, respectively, at the boundaries of the amplification band. The peak modeled efficiency and gain (17{\%}, 37 dB) were obtained at a frequency of 12 GHz. Computational simulations have also revealed correlation between the instantaneous amplification bandwidth and the spectral width of cyclotron superradiant emission within the system.",
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Simulation of high power broadband cyclotron autoresonance maser amplifier and electron beam experiments. / Speirs, David; Phelps, A.D.R.; Konoplev, I.V.; Cross, A.W.; He, W.

In: Review of Scientific Instruments, Vol. 75, No. 4, 04.2004, p. 826-831.

Research output: Contribution to journalArticle

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AU - Speirs, David

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AU - He, W.

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