摘要
模拟了轴对称虚阴极振荡器产生微波的过程。根据实验装置的特点,建立了理想的物理模型。从物理学的基本规律出发,用CIC方法编制了二维空间、三个动量分量的2 1/2维、全电磁、相对论性的数值模拟程序。选择柱状电子束进行模拟,获得了正确的计算结果和清晰的物理图象,并对计算结果作了分析。
In the paper, a 2 1/2 dimensional, fully electromagnetic, relativistic CIC particle simulation code has been developed. The code is used to simulate the virtual cathode formation and the emission of high power microwave with a cold electron beam of cylindrical symmetry. A virtual cathode will be formed when the injected current exceeds the vaccum limited current of the beam. The current transmitted from the virtual cathode varies with time and its average is larger than the static vaccum limited current. A guide field is applied to confine efficiently the radial motion of the electrons. The virtual cathode oscillates well with a definite cycle. The oscillating axial current causes the microwave radiation and the power concentrates on TM modes. The guide field is in favour of microwave generation.
出处
《强激光与粒子束》
EI
CAS
CSCD
1992年第3期362-372,共11页
High Power Laser and Particle Beams
关键词
模拟
虚阴极
微波管
振荡器
particle simulation, relativistic eletron beam, virtual cathode, microwave tube.
