Mode control in a high gain relativistic klystron amplifier with 3 GW output power

WU Yang; XIE Hong-Quan; XU Zhou

doi:10.1088/1674-1137/38/1/017001

Chinese Physics C> 2014, Vol. 38> Issue(1) : 017001 DOI: 10.1088/1674-1137/38/1/017001

Mode control in a high gain relativistic klystron amplifier with 3 GW output power

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Abstract：
Higher mode excitation is very serious in the relativistic klystron amplifier, especially for the high gain relativistic amplifier working at tens of kilo-amperes. The mechanism of higher mode excitation is explored in the PIC simulation and it is shown that insufficient separation of adjacent cavities is the main cause of higher mode excitation. So RF lossy material mounted on the drift tube wall is adopted to suppress higher mode excitation. A high gain S-band relativistic klystron amplifier is designed for the beam current of 13 kA and the voltage of 1 MV. PIC simulation shows that the output power is 3.2 GW when the input power is only 2.8 kW.

References

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Friedman M, Krall J, Lau Y Y, Serlin V. J. Appl. Phys., 1988, 64: 3353[2] Caryotakis G. Phys. Plasmas, 1998, 5: 1590[3] Roybal W T, Carlsten B E, Tallerico P J. IEEE Trans. Electron Devices, 2006, 53: 1922[4] Nusinovich G, Read M, SONG L Q. Phys. Plasmas, 2004, 11: 4893[5] Nusinovich G. High Energy Density and High Power RF: 7m th Workshop, 2006, 807: 107[6] Carlsten B E, Haynes W B. IEEE Trans. Plasma Sci., 1996, 24: 1249[7] LI Z H. Phys. Plasmas, 2009, 16: 023107[8] WU Y, XU Z, JIN X, LI Z H, TANG C X. Phys. Plasmas, 2012, 19: 023102[9] LI Z H, ZHANG H, JU B Q, WU Y. Chinese Physics C (HEP NP), 2010, 34: 598[10] ZHANG K Q, LI D J. Electromagnetic Theory for Microwave and Optoelectronics, 2001, 339

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WU Yang, XIE Hong-Quan and XU Zhou. Mode control in a high gain relativistic klystron amplifier with 3 GW output power[J]. Chinese Physics C, 2014, 38(1): 017001. doi: 10.1088/1674-1137/38/1/017001

WU Yang, XIE Hong-Quan and XU Zhou. Mode control in a high gain relativistic klystron amplifier with 3 GW output power[J]. Chinese Physics C, 2014, 38(1): 017001. doi: 10.1088/1674-1137/38/1/017001 shu

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Received: 2013-03-04
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Mode control in a high gain relativistic klystron amplifier with 3 GW output power

Corresponding author: WU Yang,

Received Date: 2013-03-04

Accepted Date: 1900-01-01

Available Online: 2014-01-05

Abstract: Higher mode excitation is very serious in the relativistic klystron amplifier, especially for the high gain relativistic amplifier working at tens of kilo-amperes. The mechanism of higher mode excitation is explored in the PIC simulation and it is shown that insufficient separation of adjacent cavities is the main cause of higher mode excitation. So RF lossy material mounted on the drift tube wall is adopted to suppress higher mode excitation. A high gain S-band relativistic klystron amplifier is designed for the beam current of 13 kA and the voltage of 1 MV. PIC simulation shows that the output power is 3.2 GW when the input power is only 2.8 kW.

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Mode control in a high gain relativistic klystron amplifier with 3 GW output power

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