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Sheet beam emittance measurements by slit-pinhole method
(Elsevier, 1996)
A method for measuring sheet electron beam emittance is developed. The effective emittances are obtained through
construction of particle distribution in the transverse dimensions using slit- pinhole parameters. Measurement ...
Analysis of the electromagnetic waves in an overmoded finite length slow wave structure
(©1995 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., 1995-04)
The electromagnetic fields of the higher order axial
resonant modes in a slow wave structure are analyzed and found
to have considerably different characteristics from those of the
conventional fundamental mode. Here, ...
Starting energy and current for a large diameter finite length backward wave oscillator operated at the fundamental mode
(©1995 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., 1995-04)
We study the starting conditions for a large diameter
(diameter/wavelength = 4.8) finite length backward wave oscillator
designed for 24-GHz operation at the fundamental T M o l
mode. This geometry is very promising for ...
High power operation of a wiggler-focused sheet beam free electron laser amplifier
(Elsevier, 1995)
The proof-of-principle millimeter-wave free electron laser amplifier at the University of Maryland has been operated at
an input power level of N 1 kW at a frequency of 86 GHz, following successful operation at smaller ...
Electromagnetic properties of open and closed overmoded slow-wave resonators for interaction with relativistic electron beams
(©1994 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., 1994-10)
Specific slow wave structures are needed in order
to produce coherent Cherenkov radiation in overmoded relativistic
generators. The electromagnetic characteristics of such
slow wave, resonant, finite length structures ...
The Axially modulated, cusp-injected, large-orbit gyrotron amplifier
(©1994 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., 1994-10)
We introduce a novel hybrid microwave amplifier
that utilizes the axial bunching mechanism of klystrons in
conjunction with the energy extraction mechanism of cyclotron
resonance masers. A simple analytic model is used ...
Characterization of electron beams generated in a high-voltage pulse-line-driven pseudospark discharge
(American Institute of Physics, 1994-05-01)
Emittance and energy measurements have been performed on a high-brightness electron beam
(>1010Nm2 rad2
) with diameter in the range 1-3 mm and energy in the range 150-170 keY. This
electron beam is generated by the ...
Periodic magnetic focusing of sheet electron beams
(American Institute of Physics, 1994-05)
Sheet electron beams focused by periodically cusped magnetic (PCM ) fields are stable against
low-frequency velocity-shear instabilities (such as the diocotron mode). This is in contrast to
the more familiar unstable ...
Experimental realization of millimeter-wave amplification by a sheet beam free electron laser
(American Institute of Physics, 1994-03-14)
We report an observation of millimeter-wave (94 GHz) amplification in a sheet beam, short period,
planar wiggler: free electron laser amplifier. The observed gain is about 5 dB for a 530 keV, 4 A
beam through a 54 cm ...