Absolute instability for enhanced radiation from a high-power plasma-filled backward-wave oscillator

M. M. Ali; K. Minami; K. Ogura; T. Hosokawa; H. Kazama; T. Ozawa; T. Watanabe; Y. Carmel; V. L. Granatstein; W. W. Destler; R. A. Kehs; W. R. Lou; D. Abe

doi:10.1103/PhysRevLett.65.855

Absolute instability for enhanced radiation from a high-power plasma-filled backward-wave oscillator

M. M. Ali, K. Minami, K. Ogura, T. Hosokawa, H. Kazama, T. Ozawa, T. Watanabe, Y. Carmel, V. L. Granatstein, W. W. Destler, R. A. Kehs, W. R. Lou, D. Abe

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	855-858
Number of pages	4
Journal	Physical Review Letters
Volume	65
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevLett.65.855
State	Published - 1 Jan 1990
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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title = "Absolute instability for enhanced radiation from a high-power plasma-filled backward-wave oscillator",

abstract = "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.",

author = "Ali, {M. M.} and K. Minami and K. Ogura and T. Hosokawa and H. Kazama and T. Ozawa and T. Watanabe and Y. Carmel and Granatstein, {V. L.} and Destler, {W. W.} and Kehs, {R. A.} and Lou, {W. R.} and D. Abe",

year = "1990",

month = jan,

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doi = "10.1103/PhysRevLett.65.855",

language = "English",

volume = "65",

pages = "855--858",

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TY - JOUR

T1 - Absolute instability for enhanced radiation from a high-power plasma-filled backward-wave oscillator

AU - Ali, M. M.

AU - Minami, K.

AU - Ogura, K.

AU - Hosokawa, T.

AU - Kazama, H.

AU - Ozawa, T.

AU - Watanabe, T.

AU - Carmel, Y.

AU - Granatstein, V. L.

AU - Destler, W. W.

AU - Kehs, R. A.

AU - Lou, W. R.

AU - Abe, D.

PY - 1990/1/1

Y1 - 1990/1/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=4243254536&partnerID=8YFLogxK

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DO - 10.1103/PhysRevLett.65.855

M3 - Article

AN - SCOPUS:4243254536

SN - 0031-9007

VL - 65

SP - 855

EP - 858

JO - Physical Review Letters

JF - Physical Review Letters

IS - 7

ER -

Absolute instability for enhanced radiation from a high-power plasma-filled backward-wave oscillator

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