220 GHz三次谐波光子带隙谐振腔回旋管振荡器的研究  

Study on 220 GHz third harmonic photonic band gap cavity gyrotron oscillator

作　　者：黄丽萍[1,2] 洪斌斌[1,2] 刘畅[3] 唐昌建[1,2] 

机构地区：[1]四川大学物理科学与技术学院,成都610064 [2]四川大学高能量密度物理及技术教育部重点实验室,成都610064 [3]解放军后勤工程学院基础部,重庆400016

出　　处：《物理学报》2014年第11期345-349,共5页Acta Physica Sinica

基　　金：国家ITER专项(批准号:2013GB107002)资助的课题~~

摘　　要：提出了一种220 GHz三次谐波光子带隙谐振腔回旋管振荡器的物理结构.利用光子晶体高频带隙确定了回旋管高阶电磁模式类TE63和三次电子回旋模的互作用状态.通过非线性理论,研究了腔内类TE63和类TE92模的弱模式竞争,得到了有利于回旋管三次谐波起振的工作条件和起振过程的非线性特征,其结果与粒子模拟基本一致.研究表明,利用光子带隙谐振腔的禁带特征,回旋管中高阶电磁模与高次电子回旋模能够发生有效的互作用关系被得到证实.A design of 220 GHz third harmonic photonic band gap cavity gyrotron oscillator is proposed. Higher photonic crystal band gap is used to ensure the interaction between the high order electromagnetic mode （TE63-like） and the third harmonic electron cyclotron mode in gyrotron. The weak mode competition between TE63-like and TE92-like mode is studied by using a nonlinear theory, and the working conditions that ensure the start-up of the gyrotron to work in the third harmonic mode, as well as the nonlinear characteristics during the start-up process, are achievdd. These results are in good agreement with the PIC （particle-in-cell） simulation. Our study shows that by using the photonic crystal as the high-frequency structure of gyrotron, high-order electromagnetic modes can interact with harmonic electron cyclotron modes efficiently.

关 键 词：光子晶体谐振腔 回旋管 模式竞争 粒子模拟 

分 类 号：TN752[电子电信—电路与系统]