NDLI: Scaling studies and time-resolved microwave measurements on a relativistic backward-wave oscillator

Content Provider	IEEE Xplore Digital Library
Author	Swegle, J.A. Anderson, R.A. Camacho, J.F. Poole, B.R. Rhodes, M.A. Rosenbury, E.T. Shaeffer, D.L.
Copyright Year	1973
Abstract	A relativistic backward-wave oscillator (BWO) operating at a frequency near 8 GHz has been built. The parameters of the 60-ns electron beam driving this microwave source are varied over the ranges 0.8-1.5 MV and 2-10 kA. Several different annular cathodes for launching the electron beam are tried, varying the outer radius and shape. The axial magnetic field guiding the beam through the BWO is varied between 0.6 and 3 T. The power transfer downstream to an output waveguide is investigated as a function of the shape of the transition from the BWO to the waveguide. The scaling of the output power and frequency with these variations is discussed. Time-resolved measurements of 2-ns-long segments of the microwave output are shown. In observations of the microwave signal, it is found that the frequency shifts as the output power envelope passes through a sharp dip. It is proposed that this shift corresponds to a change in the longitudinal operating mode of the BWO.<>
Sponsorship	IEEE Nuclear and Plasma Sciences Society
Starting Page	714
Ending Page	724
Page Count	11
File Size	1044934
File Format	PDF
ISSN	00933813
Volume Number	21
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1993-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Microwave measurements Microwave oscillators Electron beams Magnetic fields Electromagnetic waveguides High power microwave generation Frequency Shape Waveguide transitions Power generation
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Condensed Matter Physics

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