High power W-band gyro-BWO experiments

CR Donaldson, L Zhang, W He, P McElhinney, K Ronald, AW Cross, ADR Phelps

Research output: Chapter in Book/Report/Conference proceedingConference contribution book


Summary form only given. Experimental results will be presented of a frequency tunable gyrotron backward wave oscillator (gyro-BWO). 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 [1-5]. The gyro-BWO generated a maximum output power of 12 kW when driven by a 40 kV, 1.5 A, annular-shaped large-orbit electron beam and achieved a frequency tuning band of 88-102.5 GHz by adjusting the cavity magnetic field [6]. The performance of the gyro-BWO is in excellent agreement with 3D particle-in-cell (PIC) numerical simulations. Further experimental plans with a quasi-optical mode [7] converter and energy recovery [8] system will be presented.
Original languageEnglish
Title of host publicationIEEE International Conference on Plasma Science (ICOPS) 2015
Place of PublicationPiscataway
Number of pages1
ISBN (Electronic)9781479969746
Publication statusPublished - 24 May 2015
Event 42nd IEEE International Conference on Plasma Science (ICOPS 2015) - Cornelia Convention Center, Antalya, Turkey
Duration: 24 May 201528 May 2015


Conference 42nd IEEE International Conference on Plasma Science (ICOPS 2015)
Abbreviated titleICOPS 2015
Internet address


  • plasma
  • millimetre wave generation
  • millimetre wave source
  • millimetre-wave
  • magnetic fields
  • backward wave oscillators
  • electron beams
  • gyrotrons
  • harmonic analysis


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