Corrugated coaxial gyrotron with tilted inner conductor

Qin Mimi; Hou Shenyong

doi:10.11884/HPLPB201830.180246

Volume 30 Issue 11

Nov. 2018

Turn off MathJax

Article Contents

Article Navigation > High Power Laser and Particle Beams > 2018 > 30(11): 113003

Qin Mimi, Hou Shenyong. Corrugated coaxial gyrotron with tilted inner conductor[J]. High Power Laser and Particle Beams, 2018, 30: 113003. doi: 10.11884/HPLPB201830.180246

Citation:

Qin Mimi, Hou Shenyong. Corrugated coaxial gyrotron with tilted inner conductor[J]. High Power Laser and Particle Beams, 2018, 30: 113003. doi: 10.11884/HPLPB201830.180246

Qin Mimi, Hou Shenyong. Corrugated coaxial gyrotron with tilted inner conductor[J]. High Power Laser and Particle Beams, 2018, 30: 113003. doi: 10.11884/HPLPB201830.180246

Citation:

Qin Mimi, Hou Shenyong. Corrugated coaxial gyrotron with tilted inner conductor[J]. High Power Laser and Particle Beams, 2018, 30: 113003. doi: 10.11884/HPLPB201830.180246

PDF( 5371 KB)

Corrugated coaxial gyrotron with tilted inner conductor

doi: 10.11884/HPLPB201830.180246

Qin Mimi^1
,,
Hou Shenyong²

1.
School of Electrical and Information Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China
2.
School of Mathematics, Yangtze Normal University, Chongqing 408100, China

Received Date: 2018-09-25
Rev Recd Date: 2018-11-05
Publish Date: 2018-11-15

Abstract

Abstract

The tilt of inner conductor unavoidably occurs in coaxial gyrotrons. The effects of tilted inner conductor on eigenvalue, quality factor Q, resonant frequency, transverse electric field, mode competition and electronic efficiency are presented. The theory is illustrated in a 170 GHz TE_{31, 12} corrugated coaxial-gyrotron. The results indicate that eigenvalue and quality factor Q increase slightly when the tilt angle θ of inner conductor increases. However, within the range of 0-0.5°, the electronic efficiency decreases slightly when θ grows. If θ increases to 1.3°, the efficiency of beam-wave interaction reduces to 5% because mode competition becomes serious and the transverse electric field is distorted severely. Effected by the tilted inner conductor, the resonant frequency of cavity increases slightly with θ rising.
- coaxial-gyrotron,
- eigenvalue,
- transverse electric field,
- efficiency,
- tilt

FullText(HTML)

References(16)

References

[1]	Nusinovich G S, Thumm M K A, Petelin M I. The gyrotron at 50: Historical overview[J]. J Infrared Milli Terahz Waves, 2014, 35: 325-381. doi: 10.1007/s10762-014-0050-7
[2]	Iatrou C T, Kern S, Pavelyev A B. Coaxial cavities with corrugated inner conductor for gyrotrons[J]. IEEE Trans Microwave Theory Tech, 1996, 44(1): 56-64. doi: 10.1109/22.481385
[3]	Thumm M. Progress on gyrotrons for ITER and future thermonuclear fusion reactors[J]. IEEE Trans Plasma Sci, 2011, 39(4): 971-979. doi: 10.1109/TPS.2010.2095042
[4]	Piosczyk B, Arnold A, Budig H, et al. A 2-MW, 170-GHz coaxial cavity gyrotron[J]. IEEE Trans Plasma Sci, 2004, 32(3): 413-417.
[5]	Chien-Lun Hung, Nai-How Cheng, Stable 0.3-THz gyrotron backward-wave oscillator with a tapered coaxial interaction waveguide, IEEE Trans Electron Devices, 2014, 61(6): 1812-1817. doi: 10.1109/TED.2013.2296299
[6]	Qiu C R, Zhang S C, Zhang H B, et al. Nonlinear characteristics of a coaxial-waveguide cyclotron auto resonance maser (CARM) amplifier[J]. J Phys D: Appl Phys, 2006, 39(1): 424-428.
[7]	Yuvaraj S, Kartikeyan M V, Thumm M K. RF behavior of a 220/251.5-GHz, 2-MW, triangular corrugated coaxial cavity gyrotron[J]. IEEE Trans Electron Devices, 2017, 64(10): 4287-4294. doi: 10.1109/TED.2017.2743342
[8]	Qin Mimi, Yang Kuo, Luo Yong, et al. The study of a coaxial gyrotrons with misaligned inner rod[J]. Vacuum, 2015, 115: 124-129. doi: 10.1016/j.vacuum.2015.02.018
[9]	Qin Mimi, Luo Yong, Yang Kuo, et al. Nonlinear theory of a corrugated coaxial gyrotron with misaligned inner rod[J]. IEEE Trans Electron Devices, 2014, 61(12): 4247-4252. doi: 10.1109/TED.2014.2361634
[10]	Dumbrajs O, Pavelyev A B. Insert misalignment in coaxial cavities and its influence on gyrotron operation[J]. Int J Electron, 1997, 82(3): 261-268. doi: 10.1080/002072197136084
[11]	Liu D W, Yan Y, Liu S G. Characteristics analysis of a coaxial cavity with misaligned inner rod[J]. IEEE Trans Electron Devices, 2012, 59(1): 230-233. doi: 10.1109/TED.2011.2171348
[12]	Liu D W, Yan Y, Liu S G. Analysis of the characteristics of a coaxial gyrotron cavity with a tilted inner rod[J]. IEEE Trans Electron Devices, 2012, 59(3): 841-845. doi: 10.1109/TED.2011.2177095
[13]	Dumbrajs O, Nusinovich G S. Effect of electron beam misalignments on the gyrotron efficiency[J]. Phys Plasmas, 2014, 20: 073105.
[14]	Dumbrajs O, Avramidis K A, Franck J, et al. On the dependence of the efficiency of a 240GHz high-power gyrotron on the displacement of the electron beam and on the azimuthal index[J]. Phys Plasmas, 2014, 21: 013104. doi: 10.1063/1.4862446
[15]	Abramowitz M, Stegun A. Handbook of mathematical functions: With formulas, graphs, and mathematical tables[M]. New York: U S Department of Commerce, 1964.
[16]	Piosczyk B, Dammertz G, Dumbrajs O, et al. 165-GHz coaxial cavity gyrotron[J]. IEEE Trans Plasma Sci, 2004, 32(3): 853-860. doi: 10.1109/TPS.2004.827593