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More and more overmoded structures have been adopted in electronic vacuum devices because they can increase the power capacity and the frequency of the output signals. Overmoded structure device can more easily work in a low magnetic field. Overmoded structure may cause mode competition, which will reduce the output power. Mode selection in overmoded structure is studied in this article. Dispersion relation is obtained and solved numerically. The results show that the appropriate selection of working point that ensures the device working in a traveling wave state can realize transverse mode selection and appropriation selection of parameter of electron beam and the structure can realize the axial mode selection. The calculation results are verified by particle simulation.
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Keywords:
- overmoded structure /
- mode selection /
- dispersion /
- surface wave oscillator
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[4] Vlasov A N, Shkvarunets A G, Rodgers J C, Carmel Y, Antonsen T M, Abuelfadl T M, Lingze D, Cherepenin V A, Nusinovich G S, Botton M, Granatstein V L 2000 IEEE Trans. Plasma Sci. 28 550
[5] Zhang J, Zhong H H, Luo L 2004 IEEE Trans. Plasma Sci. 32 2236
[6] Zhu J, Shu T, Zhang J, Li G L, Zhang Z H 2010 Phys. Plasmas 17 083104
[7] Zhang J, Zhong H H, Jin Z X, Shu T, Cao S G, Zhou S Y 2009 IEEE Trans. Plasma Sci. 37 1552
[8] Xiao R Z, Tan W B, Li X Z, Song Z M, Sun J, Chen C H 2012 Phys. Plasmas 19 093102
[9] Zhang J, Zhong H H 2005 Acta Phys. Sin. 54 206 (in Chinese) [张军, 钟辉煌 2005 54 206]
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[1] Korovin S D, Mesyats G A, Pegel I V, Polevin S D, Tarakanov V P 2000 IEEE Trans. Plasma Sci. 28 485
[2] Agee F J 1998 IEEE Trans. Plasma Sci. 26 235
[3] Abe D K, Carmel Y, Miller S M, Bromborsky A, Levush B, Antonsen T M, Destler W W 1998 IEEE Trans. Plasma Sci. 26 591
[4] Vlasov A N, Shkvarunets A G, Rodgers J C, Carmel Y, Antonsen T M, Abuelfadl T M, Lingze D, Cherepenin V A, Nusinovich G S, Botton M, Granatstein V L 2000 IEEE Trans. Plasma Sci. 28 550
[5] Zhang J, Zhong H H, Luo L 2004 IEEE Trans. Plasma Sci. 32 2236
[6] Zhu J, Shu T, Zhang J, Li G L, Zhang Z H 2010 Phys. Plasmas 17 083104
[7] Zhang J, Zhong H H, Jin Z X, Shu T, Cao S G, Zhou S Y 2009 IEEE Trans. Plasma Sci. 37 1552
[8] Xiao R Z, Tan W B, Li X Z, Song Z M, Sun J, Chen C H 2012 Phys. Plasmas 19 093102
[9] Zhang J, Zhong H H 2005 Acta Phys. Sin. 54 206 (in Chinese) [张军, 钟辉煌 2005 54 206]
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