Browsing Office of the President (RIT) by Issue Date
Now showing items 41-60 of 175
-
Collective ion acceleration via laser controlled ionization channel
(Institute of Electrical and Electronics Engineers, 1987)Initial results from a successful laser-controlled collective ion acceleration experiment at the University of Maryland are presented. In the experiment, positive ions are trapped in the potential well at the head of ... -
Studies of microwave radiation from a low-energy rotating electron beam in a multiresonator magnetron cavity
(American institute of physics - Journal of applied physics, 1987-02-15)Presents a study on the generation of microwave radiation at high harmonics of the cyclotron frequency. Reasons for the interest in the configuration process; Theory of beam dynamics; Results of the experiments. -
Experimental study of propagation of intense relativistic electron beams in nonconducting vacuum drift tubes after passage through a localized plasma source
(American institute of physics - Journal of applied physics, 1987-04-01)Presents a study which examined the propagation of intense relativistic electron beams into evacuated nonconducting drift tubes after passage through a localized plasma source. Details of the time-integrated photographs ... -
Efficiency enhancement by using depressed collector techniques in devices employing gyrating electron beams
(Institute of Electrical and Electronics Engineers, 1987-06) -
Design of a short-period-wiggler free electron laser experiment
(Institute of Electrical and Electronics Engineers, 1987-06) -
Microwave radiation from a low-energy rotating electron beam in an azimuthally periodic magnetic wiggler field
(©1987 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE., 1987-09)The generation of microwave radiation by the interaction of a low-energy rotating electron beam (25 kV, 0.5 A, 5 ps) with an azimuthally periodic magnetic wiggler field has been studied experimentally. Narrow-band ... -
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 ... -
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 ... -
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 ... -
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 ... -
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-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) -
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 ... -
"Unshout the noise that banish'd Martius": Structural Paradox and Dissembling in Coriolanus
(Shakespearean Criticism, Gale Research Inc., 1989) -
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 ...