NDLI: Linear theory of plasma filled Coaxial Cerenkov Maser

Content Provider	IEEE Xplore Digital Library
Author	Ali, M.M. Amin, M.R. Minami, K. Ahmad, H. Granatstein, V.L.
Copyright Year	1998
Description	Author affiliation: Dept. of Electr. & Electron. Eng., Bangladesh Inst. of Technol., Rajshahi, Bangladesh (Ali, M.M.)
Abstract	Summary form only given. Linear dispersion relation of transverse magnetic (TM) modes in a plasma filled Coaxial Cerenkov Maser (CCM) driven by an intense relativistic annular electron beam has been derived. A special low frequency (LF) slow mode has been found to exist in the device along with the usual high frequency TM modes even in the absence of the background plasma. With the increase of relative dielectric constant of the filling material in the CCM, the dispersion curve of this LF slow mode is found to shift downward. The effects of the dielectric material and its radial thickness, radial position of the electron beam, and the background plasma on the dispersion characteristics of the LF and TM/sub 01/ modes in CCM have been investigated. The operating frequency and the temporal growth rate of the wave in the device for a fixed beam velocity and position are found to increase slowly with the decrease in relative dielectric constant. With the decrease of the transverse dimension of the dielectric material, the operating frequency increases for both LF and TM/sub 01/ modes, while their growth rates are found to decrease. The growth rates of both LF and TM/sub 01/ modes increase without any appreciable change in the operating frequency with the increase in the radial position of the electron beam. The presence of the background plasma in the slow wave structure enhances the temporal growth rates of both LF and TM/sub 01/ modes without any change in operating frequencies.
File Size	102441
File Format	PDF
ISBN	0780347927
ISSN	07309244
DOI	10.1109/PLASMA.1998.677558
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-06-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Coaxial components Masers Frequency Plasma devices Electron beams Dielectric materials Dispersion Plasma materials processing Dielectric constant Plasma waves
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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