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Absolute Instability for Enhanced Radiation from a High-Power Plasma-Filled Backward-Wave Oscillator
Absolute Instability for Enhanced Radiation from a High-Power Plasma-Filled Backward-Wave Oscillator
Ali, M.
Minami, K.
Ogura, K.
Hosokawa, T.
Kazama, H.
Ozawa, T.
Watanabe, T.
Carmel, Y.
Granatstein, V.L.
Destler, W.W.
Kehs, R.A.
Lou, W.R.
Abe, D.
The linear theory of electromagnetic radiation from a backward-wave oscillator with a plasma-filled, sinusoidally corrugated waveguide driven by a relativistic electron beam has been derived and analyzed numerically. The presence of plasma can cause a substantial increase in the spatial growth rate of the absolute instability. For high plamsa densities, however, the absolute instability is suppressed and only the convective instability remains. The predicted radiation enhancement can be attributed to a decrease in the group velocity of the backward wave in the presence of a plasma.
American Physical Society
1990-08
eng
journal article
http://hdl.handle.net/10191/24242
https://niigata-u.repo.nii.ac.jp/records/2489
info:doi/10.1103/PhysRevLett.65.855
AA00773679
00319007
Physical Review Letters
Physical Review Letters
65
7
855
858
https://niigata-u.repo.nii.ac.jp/record/2489/files/65_7_855-858.pdf
application/pdf
422.1 kB
2019-07-29