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In this paper, a high-efficiency Denisov-type launcher, a hardcore of quasi-optical mode converters in high-power gyrotron oscillators, is investigated. Based on integral expression of Bessel functions and geometric optics, the propagation of EM wave in circular waveguides, the syntheses of amplitude and phase of nine modes are analyzed in detail. A generalized method for designing the launcher with a dimpled waveguide wall operating in different modes is demonstrated. This method shows how to select a set of appropriate coupled modes to synthesize the Gaussian-like distribution on the inner wall of the launcher. A program is developed and its accuracy is confirmed by a high-power gyrotron at 140 GHz, in TE28,8 mode theoretically. Numerical calculations show a good agreement with reported results.
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Keywords:
- gyrotron /
- quasi-optical launcher /
- coupled mode theory /
- mode transformation
[1] Thumm M K 2011 IEEE Trans. Plasma Sci. 39 917
[2] Thumm M K, Kasparek W 2002 IEEE Trans. on Plasma Sci. 30 755
[3] Prinz O, Arnold A 2009 IEEE Trans. on Electron Devices 56 828
[4] Dumbrajs O, Nusinovich G S 2004 IEEE Trans. on Plasma Sci. 32 934
[5] Vlasov S N, Orlova I M 1974 Radiophysics Quantum Electron 17 115
[6] Thumm M K 1997 Generation and Application of High Power Microwaves (Bristol: Institute of Physics) p154
[7] Denisov G G, Kuftin A N, Malygin V I 1992 Int. J. Electronics 72 1079
[8] Kulygin M L, Denisov G G, Chirkov A V, Kuzikov S V 2006 Int. J. Infrared and Millimeter Waves 27 591
[9] Kuzikov S V 2009 Radiophysics and Quantum Electronics 52 546
[10] Neilson J M 2006 IEEE Trans. Plasma Sci. 34 635
[11] Flamm J H 2012 Ph. D. Dissertation (Karlsruhe: Karlsruher Institut fur Technologie)
[12] Thumm M K, Yang X K, Arnold A, Darnmertz G, Michel G, Pretterebner J, Wagner D 2005 IEEE Transactions on ED 52 818
[13] Du C H, Xue Q Z, Liu P K 2010 Chin. Phys. B 19 048703
[14] Sun Y Y, Zhang S C 2011 Acta Phys. Sin. 60 095201 (in Chinese) [孔艳岩, 张世昌 2011 60 095201]
[15] Luo Y T, Tang C J 2011 Acta Phys. Sin. 60 014104 (in Chinese) [罗尧天, 唐昌建 2011 60 014104]
[16] Luo Y T, Tang C J, Liu C, Liu P K 2009 Acta Phys. Sin. 58 pp8174-817922 (in Chinese) [罗尧天, 唐昌建, 刘畅, 刘濮鲲 2009 58 pp8174-8179]
[17] Wang B, Du C H, Liu P K, Geng Z H, Xu S X 2010 Acta Phys. Sin. 59 2513 (in Chinese) [王斌, 杜朝海, 刘濮鲲, 耿志辉, 徐寿喜 2010 59 2512]
[18] Liu J W, Zhao Q, Li H F 2011 Acta Phys. Sin. 60 104201 (in Chinese) [刘建卫, 赵青, 李宏福 2011 60 104201]
[19] Shi M Y, Qu Jin, Xue C J 2011 High Power Laser and Particle Beams 23 2438 (in Chinese) [施美友, 屈劲, 薛长江 2011 强激光与粒子束 23 2438]
[20] Hashimoto M 1996 Progress in Electromagnetics Research 13 115
[21] Bogdashov A A, Denisov G G 2004 Radiophysics and Quantum Electronics 47 283
[22] Qian J R 2009 Acta Optica Sinica 29 1188 (in Chinese) [钱景仁 2009 光学学报 29 1188]
[23] Blank M, Kreischer K, Temkin R J 1996 IEEE Trans. Plasma Sci. 24 1058
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[1] Thumm M K 2011 IEEE Trans. Plasma Sci. 39 917
[2] Thumm M K, Kasparek W 2002 IEEE Trans. on Plasma Sci. 30 755
[3] Prinz O, Arnold A 2009 IEEE Trans. on Electron Devices 56 828
[4] Dumbrajs O, Nusinovich G S 2004 IEEE Trans. on Plasma Sci. 32 934
[5] Vlasov S N, Orlova I M 1974 Radiophysics Quantum Electron 17 115
[6] Thumm M K 1997 Generation and Application of High Power Microwaves (Bristol: Institute of Physics) p154
[7] Denisov G G, Kuftin A N, Malygin V I 1992 Int. J. Electronics 72 1079
[8] Kulygin M L, Denisov G G, Chirkov A V, Kuzikov S V 2006 Int. J. Infrared and Millimeter Waves 27 591
[9] Kuzikov S V 2009 Radiophysics and Quantum Electronics 52 546
[10] Neilson J M 2006 IEEE Trans. Plasma Sci. 34 635
[11] Flamm J H 2012 Ph. D. Dissertation (Karlsruhe: Karlsruher Institut fur Technologie)
[12] Thumm M K, Yang X K, Arnold A, Darnmertz G, Michel G, Pretterebner J, Wagner D 2005 IEEE Transactions on ED 52 818
[13] Du C H, Xue Q Z, Liu P K 2010 Chin. Phys. B 19 048703
[14] Sun Y Y, Zhang S C 2011 Acta Phys. Sin. 60 095201 (in Chinese) [孔艳岩, 张世昌 2011 60 095201]
[15] Luo Y T, Tang C J 2011 Acta Phys. Sin. 60 014104 (in Chinese) [罗尧天, 唐昌建 2011 60 014104]
[16] Luo Y T, Tang C J, Liu C, Liu P K 2009 Acta Phys. Sin. 58 pp8174-817922 (in Chinese) [罗尧天, 唐昌建, 刘畅, 刘濮鲲 2009 58 pp8174-8179]
[17] Wang B, Du C H, Liu P K, Geng Z H, Xu S X 2010 Acta Phys. Sin. 59 2513 (in Chinese) [王斌, 杜朝海, 刘濮鲲, 耿志辉, 徐寿喜 2010 59 2512]
[18] Liu J W, Zhao Q, Li H F 2011 Acta Phys. Sin. 60 104201 (in Chinese) [刘建卫, 赵青, 李宏福 2011 60 104201]
[19] Shi M Y, Qu Jin, Xue C J 2011 High Power Laser and Particle Beams 23 2438 (in Chinese) [施美友, 屈劲, 薛长江 2011 强激光与粒子束 23 2438]
[20] Hashimoto M 1996 Progress in Electromagnetics Research 13 115
[21] Bogdashov A A, Denisov G G 2004 Radiophysics and Quantum Electronics 47 283
[22] Qian J R 2009 Acta Optica Sinica 29 1188 (in Chinese) [钱景仁 2009 光学学报 29 1188]
[23] Blank M, Kreischer K, Temkin R J 1996 IEEE Trans. Plasma Sci. 24 1058
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