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Lower-hybrid wave generation in an electron beam of finite transverse dimension

Published online by Cambridge University Press:  13 March 2009

G. B. Crew
G. B. Crew
Affiliation:
Center for Space Research, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, U.S.A.
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Abstract

The generation of lower-hybrid waves in an inhomogeneous electron beam is examined. Wave amplitudes are invariably limited by the convective nature of the instability. The self-consistent shear of the magnetic-field geometry due to the beam current is limited to the role of dividing the general problem into separate cases according to the relative orientation of the wave vector and direction of inhomogeneity. Moreover, the limiting case of small shear is smoothly connected to the case where shear is altogether negligible. Estimates of the amplification of lower-hybrid waves propagating across the electron beam are made for the various cases.

Type
Research Article
Information
Journal of Plasma Physics , Volume 41 , Issue 1 , February 1989 , pp. 119 - 137
Copyright
Copyright © Cambridge University Press 1989

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References

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