High power wideband gyrotron backward wave oscillator operating towards the terahertz region

Wenlong He, Craig Donaldson, Liang Zhang, Kevin Ronald, Paul McElhinney, Adrian Cross

Research output: Contribution to journalLetter

118 Citations (Scopus)

Abstract

Experimental results are presented of the first successful gyrotron backward wave oscillator (gyro-BWO) in the low terahertz region. A helically corrugated interaction region (HCIR) was used to allow efficient interaction over a wide frequency band at the second harmonic of the electron cyclotron frequency without parasitic output. The gyro-BWO was measured to generate a maximum output power of 12 kW in a continuous frequency tuning band of 88-102.5 GHz when driven by a 40 kV, 1.5 A, annular-shaped large-orbit electron beam. The performance of the gyro-BWO is consistent with 3D particle-in-cell (PIC) numerical simulations.
LanguageEnglish
Article number165101
Number of pages5
JournalPhysical Review Letters
Volume110
Issue number16
Early online date15 Apr 2013
DOIs
Publication statusPublished - 15 Apr 2013

Fingerprint

backward waves
oscillators
broadband
output
cyclotron frequency
tuning
interactions
electron beams
orbits
harmonics
cells
electrons
simulation

Keywords

  • gyrotron backward wave oscillator
  • wideband
  • oscillator
  • terahertz region

Cite this

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abstract = "Experimental results are presented of the first successful gyrotron backward wave oscillator (gyro-BWO) in the low terahertz region. A helically corrugated interaction region (HCIR) was used to allow efficient interaction over a wide frequency band at the second harmonic of the electron cyclotron frequency without parasitic output. The gyro-BWO was measured to generate a maximum output power of 12 kW in a continuous frequency tuning band of 88-102.5 GHz when driven by a 40 kV, 1.5 A, annular-shaped large-orbit electron beam. The performance of the gyro-BWO is consistent with 3D particle-in-cell (PIC) numerical simulations.",
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High power wideband gyrotron backward wave oscillator operating towards the terahertz region. / He, Wenlong; Donaldson, Craig; Zhang, Liang; Ronald, Kevin; McElhinney, Paul; Cross, Adrian.

In: Physical Review Letters, Vol. 110, No. 16, 165101, 15.04.2013.

Research output: Contribution to journalLetter

TY - JOUR

T1 - High power wideband gyrotron backward wave oscillator operating towards the terahertz region

AU - He, Wenlong

AU - Donaldson, Craig

AU - Zhang, Liang

AU - Ronald, Kevin

AU - McElhinney, Paul

AU - Cross, Adrian

PY - 2013/4/15

Y1 - 2013/4/15

N2 - Experimental results are presented of the first successful gyrotron backward wave oscillator (gyro-BWO) in the low terahertz region. A helically corrugated interaction region (HCIR) was used to allow efficient interaction over a wide frequency band at the second harmonic of the electron cyclotron frequency without parasitic output. The gyro-BWO was measured to generate a maximum output power of 12 kW in a continuous frequency tuning band of 88-102.5 GHz when driven by a 40 kV, 1.5 A, annular-shaped large-orbit electron beam. The performance of the gyro-BWO is consistent with 3D particle-in-cell (PIC) numerical simulations.

AB - Experimental results are presented of the first successful gyrotron backward wave oscillator (gyro-BWO) in the low terahertz region. A helically corrugated interaction region (HCIR) was used to allow efficient interaction over a wide frequency band at the second harmonic of the electron cyclotron frequency without parasitic output. The gyro-BWO was measured to generate a maximum output power of 12 kW in a continuous frequency tuning band of 88-102.5 GHz when driven by a 40 kV, 1.5 A, annular-shaped large-orbit electron beam. The performance of the gyro-BWO is consistent with 3D particle-in-cell (PIC) numerical simulations.

KW - gyrotron backward wave oscillator

KW - wideband

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KW - terahertz region

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U2 - 10.1103/PhysRevLett.110.165101

DO - 10.1103/PhysRevLett.110.165101

M3 - Letter

VL - 110

JO - Physical Review Letters

T2 - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

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