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A Field Analysis of the M-Type Backward Wave Oscillator

Gould, Roy W. (1955) A Field Analysis of the M-Type Backward Wave Oscillator. Electron Tube and Microwave Laboratory Technical Report, 3. California Institute of Technology , Pasadena, CA. (Submitted)

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A field theory of electron beams focused by crossed electric and magnetic fields is given. The theory is basic to the understanding of the small signal behavior of crossed field electron devices. It is applied to explain the slipping stream, or diocotron, effect as a coupling of two surface waves of the electron beam, and to derive the start oscillation conditions of the M-type backward wave oscillator. It is found that the slipping stream effect can reduce the starting current by an appreciable factor. The results are compared with the thin beam theory which neglects space charge effects. An analysis of a loaded strip transmission line is given, from which a method of representing space harmonic slow wave circuits by a surface admittance boundary condition is obtained. Forward and backward space harmonic interaction may be treated equally well.

Item Type:Report or Paper (Technical Report)
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Additional Information:I wish to thank my associates with whom various aspects of this problem have been discussed and particularly Professor Lester M. Field for his continued interest in this investigation. My stay at the California Institute of Technology has been made possible through the financial support of the National Science Foundation and the Hughes Air craft Company. Assistance with computation and preparation of the manuscript from Mr. Iwao Sugai; my wife, Bunny; and Mrs. Ruth Brown, is gratefully acknowledged.
Group:Electron Tube and Microwave Laboratory
Funding AgencyGrant Number
Office of Naval Research (ONR)220(13)
Sperry Gyroscope CompanyUNSPECIFIED
Series Name:Electron Tube and Microwave Laboratory Technical Report
Issue or Number:3
Record Number:CaltechAUTHORS:20190214-113127767
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:92937
Deposited By: Melissa Ray
Deposited On:14 Feb 2019 19:47
Last Modified:03 Oct 2019 20:50

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