Efficiency enhancement of high power vacuum BWO's using nonuniform slow wave structures
- Univ. of New Mexico, Albuquerque, NM (United States). Pulsed Power and Plasma Science Lab.
- Sandia National Labs., Albuquerque, NM (United States)
- Russian Academy of Sciences, Tomsk (Russian Federation). Inst. of High Current Electronics
- Air Force Material Command, Kirtland AFB, NM (United States). Advanced Weapons and Survivability Directorate
The Sinus-6, a high-power relativistic repetitively-pulsed electron beam accelerator, is used to drive various slow wave structures in a BWO configuration in vacuum. Peak output power of about 550 MW at 9.45 GHz was radiated in an 8-ns pulse. The authors describe experiments which study the relative efficiencies of microwave generation from a two-stage nonuniform amplitude slow wave structure and its variations without an initial stage. Experimental results are compared with 2.5 D particle-in-cell computer simulations. The results suggest that prebunching the electron beam in the initial section of the nonuniform BWO results in increased microwave generation efficiency. Furthermore, simulations reveal that, in addition to the backward propagating surface harmonic of the TM[sub 01] mode, backward and forward propagating volume harmonics with phase velocity twice that of the surface harmonic play an important role in high-power microwave generation and radiation.
- OSTI ID:
- 6535551
- Journal Information:
- IEEE Transactions on Plasma Science (Institute of Electrical and Electronics Engineers); (United States), Vol. 22:5; ISSN 0093-3813
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BACKWARD WAVE TUBES
DESIGN
EFFICIENCY
BEAM BUNCHING
COMPARATIVE EVALUATIONS
EXPERIMENTAL DATA
OSCILLATION MODES
BEAM DYNAMICS
DATA
ELECTRON TUBES
ELECTRONIC EQUIPMENT
EQUIPMENT
EVALUATION
INFORMATION
MICROWAVE EQUIPMENT
MICROWAVE TUBES
NUMERICAL DATA
426000* - Engineering- Components
Electron Devices & Circuits- (1990-)