Mode control in a high gain relativistic klystron amplifier with3 GW output power

• 作 者: 吴洋 谢鸿全 许州
• 机 构: Institute of Applied Electronics,China Academy of Engineering Physics,Science and Technology on High
• 出 处: Chinese Physics C
• 发表日期: 2014年01期
• 关键词: amplifier relativistic excitation drift mounted insufficient suppress reaches os

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.

Higher mode excitation is very serious in the relativistic amplifier working at tens of kilo-amperes. Mechanism of higher mode excitation is explored in the PIC simulation and it is shown that insufficient separation of cavities is 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 PICIC shows that the output power is 3.2 GW when the input power is only 2.8 kW.