C波段50MW行波输出速调管设计  

Design of C-band 50 MW klystron with traveling wave output structure

作　　者：张瑞[1,2] 王勇[1] 

机构地区：[1]中国科学院电子学研究所,北京100190 [2]中国科学院研究生院,北京100049

出　　处：《强激光与粒子束》2012年第12期2858-2864,共7页High Power Laser and Particle Beams

摘　　要：设计了导流系数1.53μP的电子枪,枪内场强低于22.1kV/mm,阴极平均负载小于6.3A/cm2;采用部分屏蔽流均匀场电磁聚焦系统,实现了对电子注的良好聚焦;设计了C波段π/2模盘荷波导行波输出结构,采用CST软件对其色散特性、耦合阻抗进行了计算分析。首先以单间隙输出腔代替行波输出结构对5腔注-波互作用系统进行计算,确定了前4腔的设计参数,然后采用PIC模拟软件对具有盘荷波导结构的输出系统进行了三维模拟,获得了大于50MW的输出功率,效率大于45%,饱和增益大于50dB,盘荷波导结构间隙电压比单间隙输出腔下降30%,效率提高4%。This paper presents the simulation study of a C-band 50 MW klystron with disc-loaded waveguide traveling wave output structure.The electron gun with a perveance of 1.53 μP is designed.The gun has a voltage gradient lower than 22.1 kV/mm and a cathode load current lower than 6.3 A/cm2.The beam focusing system is a space-charge balanced flow type with solenoid magnet structure and the focusing beam trajectories have a good laminar condition.A single gap cavity is adopted instead of the traveling wave output structure in the initial beam-wave interaction simulation to decide the parameters of the cavities except the output structure.A C-band disc-loaded waveguide output structure working at π/2 mode is designed and the dispersion and interaction impedance of the structure are determined by the CST code.The beam-wave interaction system with disc-loaded waveguide output structure is simulated by a three-dimensional PIC code.More than 50 MW output power is obtained.The efficiency is more than 45% and the saturate gain is more than 50 dB.The voltage gradient of the disc-loaded waveguide output structure is 30 percent less than that of the single gap cavity and there is an increase of 4% in efficiency above that of the single gap cavity.

关 键 词：速调管 盘荷波导 行波输出结构 注-波互作用 

分 类 号：TN124[电子电信—物理电子学]