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

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

    Corresponding author: WU Yang,

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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