Preliminary design of 1 MW, Ku-band gyrotron traveling-wave amplifier

doi:10.1007/s11460-009-0054-6

Front Elect Electr Eng Chin

2009, Vol. 4

Issue (3) : 330-334 https://doi.org/10.1007/s11460-009-0054-6

RESEARCH ARTICLE

Preliminary design of 1 MW, Ku-band gyrotron traveling-wave amplifier

Chongqing JIAO(

)

Beijing Key Laboratory of High Voltage & EMC, North China Electric Power University, Beijing 102206, China

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Abstract

The preliminary design results of a 1-MW, Ku-band gyrotron traveling wave amplifier (gyro-TWA) are presented. Operating at the second cyclotron harmonic of the TE₁₁ mode, the amplifier characterizes good stability even in the case of no distributed losses loaded, which could potentially allow it to be operated at high average power. Large signal simulation shows that the amplifier can generate a saturated peak power of about 1 MW with efficiency of 26.6%, gain of 31 dB, and 3-dB bandwidth of about 1 GHz when driven by a 100 kV, 40 A electron beam with 5% axial velocity spread.

Keywords gyrotron traveling wave amplifier (gyro-TWA) Ku-band millimeter wave amplifier

Corresponding Author(s): JIAO Chongqing,Email:cqjiao@ncepu.edu.cn

Issue Date: 05 September 2009

Cite this article:

Chongqing JIAO. Preliminary design of 1 MW, Ku-band gyrotron traveling-wave amplifier[J]. Front Elect Electr Eng Chin, 2009, 4(3): 330-334.

URL:

https://academic.hep.com.cn/fee/EN/10.1007/s11460-009-0054-6
https://academic.hep.com.cn/fee/EN/Y2009/V4/I3/330

Fig.1 Dispersion diagram of operating mode and possible oscillating modes (100 kV, =1.0)

Fig.2 Dependence of beam-wave coupling coefficient on guiding-center radius for operating mode and possible competing modes

Fig.3 Dependence on applied magnetic field of start-oscillation current for TE mode, second-harmonic absolute instability

Fig.4 Dependence on applied magnetic field of start-oscillation current and frequency for TE mode, third-harmonic gyro-BWO

Fig.5 Starting current of TE gyromonotron-type oscillation versus applied magnetic field with =60 cm and =30000

Fig.6 Dispersion diagram of TE second-harmonic gyro-TWA for different values of applied magnetic field

Fig.7 Calculated saturated power and efficiency of amplifier for different values of velocity spread

Fig.8 Calculated saturated gain of amplifier for different values of velocity spread

1	Felch K L, Danly B G, Jory H R, Kreischer K E, Lawson W, Levush B, Temkin R J. Characteristics and applications of fast-wave gyrodevices. Proceedings of the IEEE , 1999, 87(5): 752-781 doi: 10.1109/5.757254
2	Chu K R. Overview of research on the gyrotron traveling-wave amplifier. IEEE Transactions on Plasma Science , 2002, 30(3): 903-908 doi: 10.1109/TPS.2002.801560
3	Granatstein V L, Levush B, Danly B G, Parker R K. A quarter century of gyrotron research and development. IEEE Transactions on Plasma Science , 1997, 25(6): 1322-1335 doi: 10.1109/27.650903
4	Lau Y Y, Chu K R, Barnett L R, Granatstein V L. Gyrotron travelling wave amplifier: I. Analysis of oscillations. International Journal of Infrared and Millimeter Waves , 1981, 2(3): 373-393 doi: 10.1007/BF01007408
5	Chu K R, Chen H Y, Hung C L, Chang T H, Barnett L R. Ultrahigh gain gyrotron traveling wave amplifier. Physical Review Letters , 1998, 81(21): 4760-4763 doi: 10.1103/PhysRevLett.81.4760
6	Garven M, Calame J P, Danly B G, Nguyen K T, Levush B, Wood F N, Pershing D E. A gyrotron-traveling-wave tube amplifier experiment with a ceramic loaded interaction region. IEEE Transactions on Plasma Science , 2002, 30(3): 885-893 doi: 10.1109/TPS.2002.801650
7	Chu K R, Chen H Y, Hung C L, Chang T H, Barnett L R, Chen S H, Yang T T, Dialetis D J. Theory and experiment of ultrahigh-gain gyrotron traveling wave amplifier. IEEE Transactions on Plasma Science , 1999, 27(2): 391-404 doi: 10.1109/27.772266
8	Bratman V L, Cross A W, Denisov G G, He W, Phelps A D, Ronald K, Samsonov S V, Whyte C G, Young A R. High-gain wide-band gyrotron traveling-wave amplifier with a helically corrugated waveguide. Physical Review Letters , 2000, 84(12): 2746-2749 doi: 10.1103/PhysRevLett.84.2746
9	Wang Q S, McDermott D B, Luhmann N C Jr. Operation of a stable 200-kW second-harmonic gyro-TWT amplifier. IEEE Transactions on Plasma Science , 1996, 24(3): 700-706 doi: 10.1109/27.533071
10	Rodgers J, Guo H, Granaatstein V L, Chen S H, Nusinovich G S, Walter M, Zhao J. High efficiency, phase-locked operation of the harmonic-multiplying inverted gyrotwystron oscillator. IEEE Transactions on Plasma Science , 1999, 27(2): 412-421 doi: 10.1109/27.772268
11	Jiao C Q, Luo J R. Preliminary design of a harmonic-doubling gyrotron traveling wave amplifier. International Journal of Infrared and Millimeter Waves , 2007, 28(12): 1095-1101 doi: 10.1007/s10762-007-9298-5
12	Lin A T, Chu K R, Lin C C, Kou C S, McDermott D B, Luhmann N C Jr. Marginal stability design criterion for gyro-TWT’s and comparison of fundamental with second harmonic operation. International Journal of Electronics , 1992, 72(5): 873-885 doi: 10.1080/00207219208925621
13	Chu K R, Lin A T. Gain and bandwidth of the gyro-TWT and CARM amplifiers. IEEE Transactions on Plasma Science , 1988, 16(2): 90-104 doi: 10.1109/27.3798
14	Kou C S, Wang Q S, McDermott D B, Lin A T, Chin K R, Luhmann N C Jr. High-power harmonic gyro-TWT’s. I. Linear theory and oscillation study. IEEE Transactions on Plasma Science , 1992, 20(3): 155-162 doi: 10.1109/27.142815
15	Danly B G, Temkin R J. Generalized nonlinear harmonic gyrotron theory. Physics of Fluids , 1986, 29(2): 561-567 doi: 10.1063/1.865446
16	Wang Q S, Kou C S, McDermott D B, Lin A T, Chu K R, Luhmann N C. High-power harmonic gyro-TWT’s. II. Nonlinear theory and design. IEEE Transactions on Plasma Science , 1992, 20(3): 163-169 doi: 10.1109/27.142816
17	Jiao C Q, Luo J R. Linear and nonlinear analysis of a gyrotron traveling wave amplifier with misaligned electron beam. Physics of Plasmas , 2006, 13(11): 113101-1-113101-7
18	Lau Y Y, Chu K R, Barnett L, Granatstein V L. Gyrotron travelling wave amplifier: II. Effects of velocity spread and wall resistivity. International Journal of Infrared and Millimeter Waves , 1981, 2(3): 395-413 doi: 10.1007/BF01007409

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