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Gyro-BWO experiments using a helical interaction waveguide
By: Phelps, A.D.R.; Cross, A.W.; Young, A.R.; Ronald, K.; He, W.; Denisov, G.G.; Whyte, C.G.; Samsonov, S.V.; Bratman, V.L.; Speirs, D.C.; Robertson, C.W.; Thomson, J.; Rafferty, E.G.;
2005 / IEEE
Description
This item was taken from the IEEE Periodical ' Gyro-BWO experiments using a helical interaction waveguide ' A helically corrugated waveguide was used for a gyrotron backward-wave oscillator (gyro-BWO) experiment. A thermionic cathode was used to produce an electron beam of 90-215 keV in energy, 2-3 A in current, and pitch alpha of up to 1.6. The oscillator achieved high-efficiency frequency-tunable operation. At a fixed beam voltage of 185 kV and a current of 2 A, the output frequency was tuned by adjusting the magnetic field in the interaction cavity. A maximum power of 62 kW and a 3-dB frequency-tuning band of 8.0-9.5 GHz (17% relative tuning range) with a maximum electronic efficiency of 16.5% were measured. In addition, the interaction frequency could be tuned by varying the electron beam energy. At a fixed cavity magnetic field of 0.195 T, the output frequency and power from the gyro-BWO were measured as a function of tuning electron beam energy while the beam current was maintained at 2.5 A. A 3-dB relative frequency tuning range of 8% was measured when the electron beam voltage was changed from 215 to 110 kV.
Related Topics
Cavity Magnetic Field
Frequency Tuning
Cyclotron-resonance Maser
High-power Microwave Devices
16.5 Percent
2 To 3 A
8 To 9.5 Ghz
90 To 215 Kev
185 Kv
62 Kw
Gyrotrons
Backward Wave Oscillators
Helical Waveguides
Thermionic Emission
Cathodes
High-power Microwave Devices
Cyclotron-resonance Maser
Gyrotron Backward-wave Oscillator (gyro-bwo)
Electron Beam Energy
Frequency-tunable Operation
Thermionic Cathode
Gyrotron Backward-wave Oscillator
Helical Interaction Waveguide
Gyro-bwo Experiments
0.195 T
Helical Waveguides
Backward Wave Oscillators
Gyrotrons
Thermionic Cathodes
Engineered Materials, Dielectrics And Plasmas
Components, Circuits, Devices And Systems
Engineering
Helically Corrugated Waveguide