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The mode competition is the problem to be solved urgently in high-order mode gyrotron. Based on the generalized theory of transmission line, a group of first order transmission line equations that can accurately describe the coupling modes in a gradually-varying cavity is studied. Through analysing the expressions of the coupling coefficients between the various modes, a gradual-varying cavity for a gyrotron is designed. It is proved that the power in spurious modes in this novel cavity may be kept far below that in the line-joint cavity. The normalized amplitudes of non-operating modes can reach -100 dB in cavity and -88.6 dB in travelling wave guide.
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Keywords:
- cavity /
- gyrotron /
- modes /
- coupling coefficients
[1] Manfred T 2009 Conference of 13th International Vacuum Electronics Rome, April 28-30, 2009 p37
[2] Anthony T, Chu K R, Bromborsky A 1987 IEEE Trans. on Electron Device 34 2621
[3] Michael K, Alberti S, Gunter D 2003 IEEE Trans. on Plasma Sci. 31 25
[4] Read M E, Gregory S N, Dumbrajs G B 1996 IEEE Trans. on Plasma Sci. 24 586
[5] Gaponov A V, Flyagin V A, goldenber A L 1981 Int. J. Electronics 51 276
[6] Nusinovich G S,Yeddulla M 2006 Phys. Rev. Lett. 12 510
[7] Notake T, Saito T, Tatematsu Y 2009 Phys. Rev. Lett. 22 5002
[8] Gregroy S N, Pu R F, Oleksandr V S 2010 IEEE Trans. on Plasma Sci. 38 1200
[9] Huang Y, Li H F, Yang S W 1999 IEEE Trans. on Plasma Sci. 27 368
[10] Li H F, Manfred T 1991 Int. J. Electronics 71 827
[11] Li H F, Xie Z L, Wang W X 2003 IEEE Trans. on Plasma Sci. 31 263
[12] Li H F, Du P Z, Yang S W 2000 Acta Phys. Sin. 49 2000 (in Chinese) [李宏福, 杜品忠, 杨仕文 2000 物理学报 49 2000]
[13] Yu S, li H F, Xie Z L, Luo Y 2001 Acta Phys. Sin. 50 1979 (in Chinese) [喻胜, 李宏福, 谢忠怜, 罗勇 2001 物理学报 50 1979]
[14] Wesley G L 1990 IEEE Trans. on MTT 38 1617
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[1] Manfred T 2009 Conference of 13th International Vacuum Electronics Rome, April 28-30, 2009 p37
[2] Anthony T, Chu K R, Bromborsky A 1987 IEEE Trans. on Electron Device 34 2621
[3] Michael K, Alberti S, Gunter D 2003 IEEE Trans. on Plasma Sci. 31 25
[4] Read M E, Gregory S N, Dumbrajs G B 1996 IEEE Trans. on Plasma Sci. 24 586
[5] Gaponov A V, Flyagin V A, goldenber A L 1981 Int. J. Electronics 51 276
[6] Nusinovich G S,Yeddulla M 2006 Phys. Rev. Lett. 12 510
[7] Notake T, Saito T, Tatematsu Y 2009 Phys. Rev. Lett. 22 5002
[8] Gregroy S N, Pu R F, Oleksandr V S 2010 IEEE Trans. on Plasma Sci. 38 1200
[9] Huang Y, Li H F, Yang S W 1999 IEEE Trans. on Plasma Sci. 27 368
[10] Li H F, Manfred T 1991 Int. J. Electronics 71 827
[11] Li H F, Xie Z L, Wang W X 2003 IEEE Trans. on Plasma Sci. 31 263
[12] Li H F, Du P Z, Yang S W 2000 Acta Phys. Sin. 49 2000 (in Chinese) [李宏福, 杜品忠, 杨仕文 2000 物理学报 49 2000]
[13] Yu S, li H F, Xie Z L, Luo Y 2001 Acta Phys. Sin. 50 1979 (in Chinese) [喻胜, 李宏福, 谢忠怜, 罗勇 2001 物理学报 50 1979]
[14] Wesley G L 1990 IEEE Trans. on MTT 38 1617
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