Design of a C-band relativistic extended interaction klystronwith coaxial output cavity

WU Yang; ZHAO De-Kui; CHEN Yong-Dong

doi:10.1088/1674-1137/39/7/077005

Chinese Physics C> 2015, Vol. 39> Issue(7) : 077005 DOI: 10.1088/1674-1137/39/7/077005

Design of a C-band relativistic extended interaction klystronwith coaxial output cavity

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Abstract：
In order to overcome the disadvantages of conventional high frequency relativistic klystron amplifiers in power capability and RF conversion efficiency, a C-band relativistic extended interaction klystron amplifier with coaxial output cavity is designed with the aid of PIC code MAGIC. In the device, disk-loaded cavities are introduced in the input and intermediate cavity to increase the beam modulation depth, and a coaxial disk-loaded cavity is employed in the output cavity to enhance the RF conversion efficiency. In PIC simulation, when the beam voltage is 680 kV and current is 4 kA, the device can generate 1.11 GW output power at 5.64 GHz with an efficiency of 40.8%.

References

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Friedman M, Krall J, Lau Y Y et al. J. Appl. Phys., 1988, 64: 3353[2] Caryotakis G. Phys. Plasmas, 1998, 5: 1590[3] WU Yang, XIE Hong-Quan, LI Zheng-Hong et al. Phys. Plasmas, 2013, 20: 113102[4] LI Zheng-Hong, ZHANG Hong, JU Bing-Quan et al. Chinese Physics C, 2010, 34(5): 598[5] CHEN Yong-Dong, JIN Xiao, LI Zheng-Hong et al. High Power Laser and Particle Beams, 2012, 24(9): 2151 (in Chinese)[6] Carlsten B E, Faehl R J, Fazio M V et al. IEEE Trans. Plasma Sci., 1996, 22: 719[7] Goplen B, Ludeking L, Smithe D. MAGIC User's Manual. Newington, VA: Mission Research Corp., 1996[8] WU Yang, LI Zheng-Hong, HUANG Hua et al. High Power Laser and Particle Beams, 2010, 22(efeq3): 625 (in Chinese)[9] WU Yang, XU Zhou, ZHOU Lin et al. Acta Phys. Sin., 2012, 61(22): 224101 (in Chinese)[10] Friedman M, Serlin V, Lampe M et al. Phys. Rev. Lett., 1995, 74: 322[11] HUANG Hua, MENG Fan-B, FAN Zhi-Kai et al. Acta Phys. Sin., 2006, 55(10): 5344 (in Chinese)[12] Carlsten B E, Faehl R J, Fazio M V et al. IEEE Trans. Plasma Sci., 1994, 22: 730

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WU Yang, ZHAO De-Kui and CHEN Yong-Dong. Design of a C-band relativistic extended interaction klystronwith coaxial output cavity[J]. Chinese Physics C, 2015, 39(7): 077005. doi: 10.1088/1674-1137/39/7/077005

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Received: 2014-09-28
Revised: 2015-01-18

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沈阳化工大学材料科学与工程学院沈阳 110142

Design of a C-band relativistic extended interaction klystronwith coaxial output cavity

Received Date: 2014-09-28
Accepted Date: 2015-01-18
Available Online: 2015-07-05

Abstract: In order to overcome the disadvantages of conventional high frequency relativistic klystron amplifiers in power capability and RF conversion efficiency, a C-band relativistic extended interaction klystron amplifier with coaxial output cavity is designed with the aid of PIC code MAGIC. In the device, disk-loaded cavities are introduced in the input and intermediate cavity to increase the beam modulation depth, and a coaxial disk-loaded cavity is employed in the output cavity to enhance the RF conversion efficiency. In PIC simulation, when the beam voltage is 680 kV and current is 4 kA, the device can generate 1.11 GW output power at 5.64 GHz with an efficiency of 40.8%.