W波段回旋行波管收集极热可靠性设计  

Thermal stability analysis of the collector in W band gyrotron traveling-wave tube

作　　者：孙昊[1] 王峨锋[1] 朱源[1] 曾旭[1] 冯进军[1] 闫铁昌[1] 

机构地区：[1]北京真空电子技术研究所 大功率微波电真空器件技术国防科技重点实验室,北京100016

出　　处：《强激光与粒子束》2014年第11期110-113,共4页High Power Laser and Particle Beams

基　　金：国家重点基础研究发展计划项目

摘　　要：利用粒子模拟软件和热分析软件,对W波段回旋行波管收集极区的电子轨迹和热分布进行了仿真计算。通过对收集极磁场参数的优化,调节了收集极区的电子分布,使得电子轰击区域从17.05cm2增加到28.52cm2,提高了67%,从而降低了单位面积的功率密度。通过对收集极内壁热分布的仿真分析,确定了1kW/cm2的功率密度及1.12L/s的冷却水流量,以确保收集极内壁温度低于材料熔点,不会产生物理损坏,使得收集极能够稳定工作,保证了管子的工作稳定性。通过热仿真计算验证了优化方案的可行性,并已应用于实际。In this article,the electron trajectory and thermal distribution in the collector region of W-band gyrotron traveling-wave tube were calculated with PIC code and thermal analysis code.Through the optimization of collector magnetic field parameters,the electron distribution in the collector region was simulated and the area of electron trajectory was increased from 17.05 cm2 to 28.52 cm2 （nearly 67% larger）,which reduced the power density per unit area.Then the power density was determined to be 1 kW/cm2 and the rate of cooling water flow 1.12 L/s by the thermal analysis of thermal distribution in the collector,which makes the temperature of the inner wall of collector lower than the melting point of the material,us physical cracks will not occur,which could ensure the stability of the collector,so that the whole gyro-TWT could work steadily.Thermal analysis has verified the feasibility of optimal method,and the method has been usedin practical tubes.

关 键 词：回旋行波管 收集极 粒子模拟 电子轨迹 热仿真 

分 类 号：TN129[电子电信—物理电子学]