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Plasma influence on the dispersion properties of finite-length, corrugated waveguides
(The American Physical Society, 1996-03)
We present an experimental study of the electromagnetic properties of transverse magnetic modes in a
corrugated-wall cavity filled with a radially inhomogeneous plasma. The shifts of the .resonant frequencies of
a ...
Enhancement of overall efficiency in large-orbit gyrotrons
(Taylor and Francis, 1990)
Energy recovery from the spent beam in gyrotrons can enhance their overall
efficiency. A technique for converting the rotational motion in the spent beam of
a large-orbit gyrotron into axial motion, before leading it ...
A High-average power tapered FEL amplifier at submillimeter frequencies using sheet electron beams and short-period wigglers
(Elsevier, 1990-09-17)
A high-average-power FEL amplifier operating at submillimeter frequencies is under development
at the University of Maryland. Program goals are to produce a CW, ~ 1 MW,
FEL amplifier source at frequencies between 280 GHz ...
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, ...
First operation of a 94 GHz, sheet beam, FEL amplifier
(Elsevier, 2002-10-14)
Millimeter wave (94 GHz) amplification has been observed in the sheet beam, planar wiggler, free electron laser. Using a 4 A sheet beam (20 mm × 1.0 mm) at an electron energy of 530 keV, injected wave power of 5 W was ...
Non-adiabatic transition of beams in gyrotrons through various magnetic field profiles
(Taylor & Francis, 1991)
The achievement of efficiency enhancement in small-orbit gyrotrons by using
depressed collector techniques requires precisely configured magnetic field
profiles which present adiabatic as well as non-adiabatic transitions ...
Experimental study of the collective acceleration of deuterons
(American Institute of Physics, 1985-03-01)
The collective acceleration of deuterons by an intense relativistic electron beam has been studied experimentally. The accelerated ion energy spectra for various different experimental configurations has been measured using ...
Millimeter wave radiation from a rotating electron ring subjected to an azimuthally periodic wiggler magnetic field
(Elsevier B.V. - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1986-09)
The generation of millimeter wave radiation (80–180 GHz) caused by the interaction of a rotating electron ring (2 MV, 1.4–3.6 kA, 5 ns) with an azimuthally periodic wiggler magnetic field has been studied experimentally ...
Experimental and numerical results on a millimeter-wave free electron laser amplifier
(Elsveier - Nuclear instruments and methods in physics research, 1993-07)
Progress in studies of a millimeter-wave free electron laser amplifier based on a small period planar wiggler and a sheet electron beam is reported. Successful propagation of a 15 A sheet electron beam has been accomplished ...
From linearity towards chaos: Basic studies of relativistic backward-wave oscillators
(American Physical Society, 1992-09-14)
Recent experimental studies have revealed for the first time some basic features of pulsed. relativistic (300-600 keY) backward-wave oscillators such as starting current, axial mode locking, and multifrequency
operation. ...