Numerical Simulation Study on the Interaction of the Beam and Cavity Modes in an Inward-Emitting Coaxial Virtual Cathode Oscillator

XING Qing-Zi; WANG Dong; HE Xiao-Zhong; ZHENG Shu-Xin; DENG Jing-Kang

Chinese Physics C> 2006, Vol. 30> Issue(6) : 571-576

Numerical Simulation Study on the Interaction of the Beam and Cavity Modes in an Inward-Emitting Coaxial Virtual Cathode Oscillator

Department of Physics, Tsinghua University, Beijing 100084, China2 Department of Engineering Physics, Tsinghua University, Beijing 100084, China

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Abstract：
The dominant frequency in an inward-emitting coaxial virtual cathode oscillator is solved analytically based on the steady-state relativistic-fluid-Maxwell equations. Full three-dimensional numerical simulation with the PIC method is carried out using the TS3 module of the MAFIA code. The frequency spectrum and the output power are obtained by monitoring the five propagating modes in the cylindrical output waveguide. The result shows that when the anode reflector exists, the frequency spectrum can be improved effectively by the formed quasi-cavity and hence the corresponding energy conversion efficiency can be enhanced.

References

[1]

. JIANG W, Woolverton K, Dickens J et al. IEEE Trans.Plasma Sci., 1999, 27(5): 1538—15422. SHAO H, LIU G Z, YANG Z F. Preliminary Experimental Study of Novel Coaxial Virtual Cathode Oscillator(Vircator). Proc. 5th HPM Conf. China. Zhuhai: 2002.263—267(in Chinese)(邵浩，刘国治，杨占峰.同轴虚阴极振荡器初步实验研究.第五届个国HPM会议论文集.珠海:2002. 263-267)3. JIANG W, Dickens J, Kristiansen M. IEEE Trans. Plasma Sci., 1999, 27(5): 1543—15444. SHAO H, LIU G Z, SONG Z M et al. Numerical Simula-tion Studies of Coaxial Vircators. Proc. 12th Inter. Conf.High-Power Particle Beams. Piscataway: IEEE Press, 1998.792—7955. CHEN X D, Toh W K, Lindsay P A. IEEE Trans. Plasma Sci., 2004, 32(3): 1191—11996. YANG W Y, DING W. IEEE Trans. Plasma Sci., 2004,32(3): 1187—11907. XIE W K, XIAO S L, QIAN G D. J. UEST of China, 1999,28(2): 166—170(in Chinese)(谢文楷，肖顺禄，钱光第.电f科技大学学报，1999, 28(2):166-170)8. Sung K Y, Jeon W, Jung Y et al. IEEE Trans. Plasma Sci.,2005, 33(4): 1353—13579. Woo W. Phys. Fluids, 1987, 30(1): 239—24410. LIAO P, YANG Z H, LEI W Q et al. High Power Laser andParticle Beams, 2004, 16(3): 353—357(in Chinese)(廖平，杨中海，需文强等.强激光与粒r束，2004, 16(3):353-357)11. XING Q Z, WANG D, HUANG F et al. IEEE Trans.Plasma Sci., 2005, accepted12. Hwang C S, WU M W, SONG P S et al. J. Appl. Phys.,1991, 69(3): 1247—125213. Crawford M, Kristiansen M, Hatfield L L. Experimental Results from a Coaxial Virtual Cathode Oscillator. IEEE Int. Conf. Pulsed Power. Albuquerque: IEEE Press, 1995.682—687

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XING Qing-Zi, WANG Dong, HE Xiao-Zhong, ZHENG Shu-Xin and DENG Jing-Kang. Numerical Simulation Study on the Interaction of the Beam and Cavity Modes in an Inward-Emitting Coaxial Virtual Cathode Oscillator[J]. Chinese Physics C, 2006, 30(6): 571-576.

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Received: 2005-12-08
Revised: 2006-01-16

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通讯作者: 陈斌, [email protected]

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沈阳化工大学材料科学与工程学院沈阳 110142

Numerical Simulation Study on the Interaction of the Beam and Cavity Modes in an Inward-Emitting Coaxial Virtual Cathode Oscillator

Corresponding author: XING Qing-Zi,

Department of Physics, Tsinghua University, Beijing 100084, China2 Department of Engineering Physics, Tsinghua University, Beijing 100084, China

Received Date: 2005-12-08

Accepted Date: 2006-01-16

Available Online: 2006-06-05

Abstract: The dominant frequency in an inward-emitting coaxial virtual cathode oscillator is solved analytically based on the steady-state relativistic-fluid-Maxwell equations. Full three-dimensional numerical simulation with the PIC method is carried out using the TS3 module of the MAFIA code. The frequency spectrum and the output power are obtained by monitoring the five propagating modes in the cylindrical output waveguide. The result shows that when the anode reflector exists, the frequency spectrum can be improved effectively by the formed quasi-cavity and hence the corresponding energy conversion efficiency can be enhanced.

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Numerical Simulation Study on the Interaction of the Beam and Cavity Modes in an Inward-Emitting Coaxial Virtual Cathode Oscillator

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