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Now showing items 21-30 of 33
Demonstration of efficiency enhancement on a high-power backward-wave oscillator by plasma injection
(American Physical Society, 1989)
An experimental demonstration of a strong enhancement of the interaction efficiency in a high-power
relativistic backward-wave oscillator when plasma is injected is presented. Controlled plasma injection
enhances the ...
Observation of a resonant enhancement of microwave radiation from a gas-filled backward wave oscillator
(American Institute of Physics, 1988-08-15)
High-power microwave radiation at 8 GHz from a gas-fined backward wave oscillator driven
by an intense relativistic electron beam has been measured. It has been observed that an order
of magnitude resonant increase in ...
Short-period-wiggler free electron lasers with sheet electron beams
(Institute of Electrical and Electronics Engineers, 1988-06)
Experimental high power plasma-filled backward wave oscillator results
(Institute of Electrical and Electronics Engineers, 1988-06)
Propagation of wiggler focused relativistic sheet electron beams
(American Institute of Physics, 1988-02-09)
A recent design concept for millimeter-wave free-electron lasers [J. Appl, Phys, 60, 521
( 1986)] would require the stable propagation of a sheet electron beam through a narrow
waveguide channel. Experimental results ...
Beam conditioning for electron energy recovery systems in devices employing axis-encircling beams
(Taylor & Francis, 1988)
Depressed collectors are extensively used in linear-beam devices. In spiraling
beam devices, the motion of the spent beam needs to be converted into axial
motion before it can deliver energy to the retarding axial ...
High power plasma filled backward wave oscillators
(SPIE, 1988-01)
Relativistic backward wave oscillators (BWOs) have proven to be relatively efficient,
high-power microwave sources in the centimeter wavelength range. Recent Soviet results
have indicated that the use of a background ...
Low-voltage, megawatt free-electron lasers at a frequency near 300 GHz
(SPIE, 1988-01)
Design procedures and beam transport feasibility experiments Il.re discussed for a novel,
millimeter-wave free electron laser (FEL) concept employing short period magnetic
undulators and a sheet electron beam. The ...
Depressed collectors for a large orbit gyrotron
(1987-12)
An auxiliary magnetic cusp transforms
rotational motion in the spent beam of a Large-Orbit
Gyrotron into axial motion. Results
regarding the interfacing of this cusp with a
depressed collector region and the effects ...
A Short-period wiggler millimeter-wave free electron laser for plasma heating and space-borne radar
(1987-12)
We will report on the status of a new mm-wave
FEL research program based on short-period
electromagnet wigglers and a low voltage (500 kV)
sheet electron beam. Recent results of
measurements and theoretical modeling ...