Conference proceeding
Experiments on slotted coaxial high-power gyrotrons
Proceedings of SPIE, v 4031(1), pp 8-18
14 Jul 2000
Abstract
This research program investigates high power microwave generation utilizing a microsecond electron beam accelerator to study means of eliminating microwave pulse-shortening. The particular device under study is the coaxial gyrotron oscillator in the S-band frequency range. Experiments have concentrated on three types of gyrotron cavities: (1) coaxial, unslotted, (2) coaxial, slotted, and (3) noncoaxial, unslotted. The first major result is that the coaxial rod raises the limiting current in the e-beam diode, permitting reliable, higher current extraction into the microwave tube. The second major finding is that the slotted cavity gives the highest peak powers (approximately 90 MW) but very short pulselengths (approximately 10 - 20 ns). The unslotted coaxial gyrotron emits power levels of 20 - 40 MW with longer pulselengths (up to 40 ns). The noncoaxial gyrotron radiates lower peak power levels (approximately 20 MW). All of the gyrotron types exhibited signs of the pulse shortening mechanisms of mode hopping and mode competition as diagnosed by time-frequency-analysis (TFA). TFA also shows that lower power microwave oscillation is maintained over some 300 ns, but the power level may be modulated due to e-beam voltage fluctuations.
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Details
- Title
- Experiments on slotted coaxial high-power gyrotrons
- Creators
- Ronald M Gilgenbach - University of MichiganReginald L Jaynes - University of MichiganWilliam E Cohen - University of MichiganChristopher W Peters - Michigan UnitedMichael R Lopez - University of MichiganYue Y Lau - University of MichiganWilliam J Williams - University of MichiganT. A Spencer - United States Air Force Research Laboratory
- Publication Details
- Proceedings of SPIE, v 4031(1), pp 8-18
- Conference
- Intense Microwave Pulses VII
- Publisher
- Society of Photo-Optical Instrumentation Engineers (SPIE)
- Number of pages
- 11
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- Electrical and Computer Engineering
- Web of Science ID
- WOS:000166690300002
- Other Identifier
- 991021957151404721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Engineering, Electrical & Electronic
- Optics
- Physics, Fluids & Plasmas