ABSOLUTE INSTABILITY FOR ENHANCED RADIATION FROM A HIGH-POWER PLASMA-FILLED BACKWARD-WAVE OSCILLATOR

被引：22

作者：

ALI, MM

MINAMI, K

OGURA, K

HOSOKAWA, T

KAZAMA, H

OZAWA, T

WATANABE, T

CARMEL, Y

GRANATSTEIN, VL

DESTLER, WW

KEHS, RA

LOU, WR

ABE, D

机构：

[1] NATL INST FUS SCI,NAGOYA 464,JAPAN

[2] UNIV MARYLAND,PLASMA RES LAB,COLLEGE PK,MD 20742

[3] HARRY DIAMOND LABS,ADELPHI,MD 20783

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 65卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.65.855

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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. © 1990 The American Physical Society.

引用

页码：855 / 858

页数：4

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