HIGH-POWER OPERATION OF FIRST AND 2ND-HARMONIC GYROTWYSTRONS

被引：27

作者：

LAWSON, W ^{[1
]}

LATHAM, PE ^{[1
]}

CALAME, JP ^{[1
]}

CHENG, J ^{[1
]}

HOGAN, B ^{[1
]}

NUSINOVICH, GS ^{[1
]}

IRWIN, V ^{[1
]}

GRANATSTEIN, VL ^{[1
]}

REISER, M ^{[1
]}

机构：

[1] UNIV MARYLAND,DEPT ELECT ENGN,COLLEGE PK,MD 20742

来源：

JOURNAL OF APPLIED PHYSICS | 1995年 / 78卷 / 01期

关键词：

D O I：

10.1063/1.360639

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the first experimental operation of overmoded first and second harmonic gyrotwystron amplifier configurations. Both devices utilize a single cavity which is driven near 9.87 GHz in the TE011 mode, heavily attenuated drift tubes, and long tapered output waveguide sections. A magnetron injection gun produces a 460 kV, 245 A beam with a maximum average perpendicular-to-parallel velocity ratio approximately equal to one. The axial magnetic field profile is sharply tapered in the output section. Peak powers above 21 MW are achieved in 1 μs pulses with an efficiency exceeding 22% and a large signal gain near 24 dB in the first harmonic tube. The second harmonic tube achieves nearly 12 MW of the peak power with an efficiency of 11% and a gain above 21 dB. First harmonic amplifier performance is limited principally by competition from a fundamental mode output waveguide interaction; the second harmonic tube is limited by both travelling wave output modes and by a down-taper oscillation. © 1995 American Institute of Physics.

引用

页码：550 / 559

页数：10

共 25 条

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[2] MEASUREMENTS OF VELOCITY RATIO IN A 90 MW GYROKLYSTRON ELECTRON-BEAM [J].