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Now showing items 61-70 of 126
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 ...
Free electron laser with small period wiggler and sheet electron beam: A Study of the feasibility of operation at 300 GHz with 1 MW CW output power
(1989)
The use of a small period wiggler (Cw < 1 cm) together with a sheet electron beam
has been proposed as a low cost source of power for electron cyclotron resonance heating
(ECRH) in magnetic fusion plasmas. Other potential ...
Near-millimeter free electron lasers with small period wigglers and sheet electron beams
(Elsevier, 1988-10)
Electron cyclotron resonance heating (ECRH) of plasmas in magnetic fusion research and space-borne radar systems are both projected to require high power radiation sources at wavelength λ not, vert, similar 1 mm. For ECRH, ...
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)
High-power microwave generation from large-orbit devices
(IEEE, 1988-04)
Experimental and theoretical studies at the University of
Maryland on the production of high-power microwave radiation in
cusp-injected, large-orbit devices are reviewed. Three classes of devices
belonging to this ...
Short-pulse high-power microwave propagation in the atmosphere
(American Institute of Physics, 1988-02-12)
The propagation of high-power 00-200 kW/cm2
) short-burst (3-30 ns) microwave pulses in
the atmosphere has been studied experimentally. Microwave power from a large orbit gyrotron
operating at 9.6 GHz is focused by a ...
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 ...