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Measurements on wave propagation characteristics of spiraling electron beamsDispersion characteristics of cyclotron-harmonic waves propagating on a neutralized spiraling electron beam immersed in a uniform axial magnetic field are studied experimentally. The experimental setup consisted of a vacuum system, an electron-gun corkscrew assembly which produces a 110-eV beam with the desired delta-function velocity distribution, a measurement region where a microwave signal is injected onto the beam to measure wavelengths, and a velocity analyzer for measuring the axial electron velocity. Results of wavelength measurements made at beam currents of 0.15, 1.0, and 2.0 mA are compared with calculated values, and undesirable effects produced by increasing the beam current are discussed. It is concluded that a suitable electron beam for studies of cyclotron-harmonic waves can be generated by the corkscrew device.
Document ID
19770034971
Document Type
Reprint (Version printed in journal)
Authors
Singh, A. (Southern University Baton Rouge, La., United States)
Getty, W. D. (Michigan, University Ann Arbor, Mich., United States)
Date Acquired
August 9, 2013
Publication Date
December 1, 1976
Publication Information
Publication: IEEE Transactions on Plasma Science
Volume: PS-4
Subject Category
PLASMA PHYSICS
Funding Number(s)
CONTRACT_GRANT: NGL-23-005-183
Distribution Limits
Public
Copyright
Other