Excitation of surface cyclotron O modes by charged-particle beams
A theoretical investigation of the interaction between a charged-particle beam and ordinarily polarized surface waves at the first two harmonics of ion and electron cyclotron frequencies propagating across an external steady magnetic field is carried out. The case of weak plasma spatial dispersion w...
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Published in | Journal of plasma physics Vol. 68; no. 2; pp. 129 - 136 |
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Main Author | |
Format | Journal Article |
Language | English |
Published |
Cambridge, UK
Cambridge University Press
01.08.2002
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Subjects | |
Online Access | Get full text |
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Summary: | A theoretical investigation of the interaction between a charged-particle
beam and ordinarily polarized surface waves at the first two harmonics of ion
and electron cyclotron frequencies propagating across an external steady magnetic
field is carried out. The case of weak plasma spatial dispersion when the Larmor
radii of plasma particles are much less than the penetration depth of these waves
into the plasma is considered. The indicated waves are eigenmodes of the planar
plasma–vacuum–metal waveguide structure, which is exposed to a steady magnetic
field oriented parallel to the plasma surface. It is supposed that a cold charged-
particle beam propagates over the plasma surface in the vacuum region. The beam
density is less than the plasma density. Excitation of these O modes at the first
and second harmonics of electron and ion cyclotron frequencies caused by the both
resonant beam and dissipative instabilities is studied analytically. The dependence
of their growth rates on parameters of the considered waveguide structures is also
examined. |
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Bibliography: | PII:S0022377802001824 istex:32EAE04E4D08659F3F5B0F88F0BEDCC817FA088D ark:/67375/6GQ-PXHWTRNZ-1 |
ISSN: | 0022-3778 1469-7807 |
DOI: | 10.1017/S0022377802001824 |