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Slow cyclotron instability due to surface modulation of annular beam
Slow cyclotron instability due to surface modulation of annular beam
Ogura, Kazuo
Yamazaki, Hoshiyuki
Kiuchi, Yutaka
Amin, Ruhul MD.
The Cherenkov instability used in slow-wave devices has been well studied in the literature. However, in previous analyses, the beam motion is restricted to the longitudinal direction assuming an infinitely strong magnetic field. For the finite strength magnetic field, the transverse beam perturbation cannot be ignored and leads to the slow cyclotron instability. Recently, a new version of self-consistent field theory considering three-dimensional perturbation has been developed based on a solid beam, in which the effect of the transverse perturbation appears as a surface charge at a fixed boundary. In the case of a thin annular beam, the boundary is modulated and is essentially different from the solid beam case. We propose a self-consistent field theory considering the moving modified boundary surface. The slow cyclotron instability due to the modulation of an infinitesimally thin annular electron beam is presented.
Cambridge University Press
2006
eng
journal article
http://hdl.handle.net/10191/24166
https://niigata-u.repo.nii.ac.jp/records/2071
info:doi/10.1017/S0022377806005095
http://journals.cambridge.org/
AA00705205
00223778
Journal of Plasma Physics
Journal of Plasma Physics
72
6
905
908
https://niigata-u.repo.nii.ac.jp/record/2071/files/72_6_905-908.pdf
application/pdf
101.9 kB
2019-07-29