Comparative research on three types of coaxial double-corrugation periodic slow-wave structures

Ge Xing-Jun; Zhong Hui-Huang; Qian Bao-Liang; Zhang Jun

doi:10.7498/aps.59.2645

Abstract

The method for deducing expressions of arbitrary geometrical structures is studied in detail by using the Fourier series expansion. The dispersion curves of the slow-wave structures (SWSs) with the cosinoidal，rapezoidal and rectangular corrugations are obtained by numerical calculation. Moreover，the longitudinal resonance properties of the finite-length coaxial SWS are investigated with the S-parameter method. It is proposed that the introduction of a well designed coaxial extractor to slow-wave devices can help to reduce the period-number of the SWS，which not only can make the devices more compact，but also can avoid the destructive competition between various longitudinal modes. Furthermore，a compact L-band coaxial relativistic backward wave oscillator (RBWO) is investigated and optimized in detail with particle-in-cell (PIC) methods (KARAT code). In the preliminary experiments，the measured microwave frequency is 161 GHz，with a peak power level of above 102 GW，when the diode voltage is 670 kV and the current is 107 kA. The pulse duration (full-width at half-maximum) of the radiated microwave is 22 ns.

Keywords:

Authors and contacts

1.
国防科学技术大学光电科学与工程学院，长沙 410073

References

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[2]	［2］Xiao R Z，Liu G Z，Chen C H 2008 Chin. Phys. B 17 3807
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[10]	］Zhang J，Zhong H H，Luo L 2004 IEEE Trans. Plasma Sci. 32 2236
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[12]	］Liu G Z，Xiao R Z，Chen C H 2008 J. Appl. Phys. 103 093303
[13]	］Xiao R Z，Zhang L J，Liang T Z 2008 Phys. Plasmas 17 053107
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Cited By

[1]	［1］Zhang J，Zhong H H 2005 Acta Phys. Sin. 54 0206 （in Chinese）［张军、钟辉煌 2005 物理学报 54 0206］
[2]	［2］Xiao R Z，Liu G Z，Chen C H 2008 Chin. Phys. B 17 3807
[3]	［3］Nation J A 1970 Appl. Phys. Lett. 17 491
[4]	［4］Swegle J A，Poukey J W，Leifeste G T 1985 Phys. Fluids 28 2882
[5]	［5］Choyal Y，Maheshwari K P 1995 Phys. Plasmas 2 319
[6]	［6］Minami K，Kobayashi S，Hayatsu Y 2002 IEEE Trans. Plasma Sci. 30 1196
[7]	［7］Chang T H，Yu C F，Hung C L 2008 Phys. Plasmas 15 073105
[8]	［8］Bugaev S P，Cherepenin V A，Kanavets V I 1990 IEEE Trans. Plasma Sci. 18 525
[9]	［9］Larald M，Edl S，Raymond W L 1994 IEEE Trans. Plasma Sci. 22 554
[10]	］Zhang J，Zhong H H，Luo L 2004 IEEE Trans. Plasma Sci. 32 2236
[11]	］Xiao R Z，Lin Y Z，Song Z M 2007 IEEE Trans. Plasma Sci. 35 1456
[12]	］Liu G Z，Xiao R Z，Chen C H 2008 J. Appl. Phys. 103 093303
[13]	］Xiao R Z，Zhang L J，Liang T Z 2008 Phys. Plasmas 17 053107
[14]	］Main W，Carmel Y，Ogura K 1994 IEEE Trans. Plasma Sci. 22 566
[15]	］Levush B，Antonsen T M，Bromborsky A 1992 IEEE Trans. Plasma Sci. 20 263
[16]	］Gunin A V，Korovin S D，Kurkan I K 1998 IEEE Trans. Plasma Sci. 26 326

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Vol. 59, Issue 4 - 2010-02-20

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