摘要
提出了一种类周期加载微波腔结构,通过理论和全电磁 2.5 维相对论粒子模拟程序计算,证实了电子束可以与这种谐振腔结构发生相互作用。基于该谐振腔特点,通过ASTRA程序(包含电子束自身空间电荷场的粒子运动模拟程序)设计和优化了一个 X波段的类周期加载微波腔振荡器,该振荡器的束波转换效率理论值可达52%,工作频率为9.4 GHz。然后用全电磁2.5维相对论粒子模拟程序进行了进一步的优化,模拟中,输入电压700 kV,电流6.6 kA,磁场4.4 T,其输出功率为1.67 GW,束波转换效率达到36%。实验上输出微波峰值功率达到1.3 GW,脉宽26 ns,束波转换效率为26%。
A novel resonator of quasi-periodic structure is put out in the paper. The interaction between the beam and the microwave field in the cavity is theoretically investigated with 2.5 dimensional particle simulation code. With this type of structures, theoretically beam-microwave interaction efficiency can reach 52%. An X-band quasi-periodic structure cavity is designed, its working frequency is 9.4 GHz. With the voltage 700 kV, current 6.6 kA and magnet field 4.4 T in the simulation, the output power is 1.67 GW, the frequency 9.4 GHz and interaction efficiency about 36%. Driven by Sinus-700 accelerator in the experiment, microwave power is 1.3 GW, the frequency is 9.4 GHz, pulse duration is about 26 ns, and the efficiency is 26%.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2005年第2期245-248,共4页
High Power Laser and Particle Beams
基金
国家863计划项目资助课题
关键词
微波腔
模式
群聚
返波管
高功率微波
Backward wave tubes
Computer simulation
Design
Electron beams
Electron mobility
Optimization
Oscillators (electronic)
