高功率回旋管收集极的设计及其热分析

Design and Thermal Analysis of the Collector for High Power Gyrotron

利用电子回旋脉塞理论计算电子枪的结构参数,采用粒子模拟软件对电子注的运动轨迹进行仿真分析和优化电子枪结构参数。为保证回旋管能够稳定高效地工作,利用多物理场方法,分析回旋管收集极的温度分布。在高功率回旋管的工作参数下,采用三维电磁场仿真软件(CST)粒子工作室与多物理场工作室,对收集极进行稳态热分析,收集极的局部最高温度为332℃。为降低收集极的温度,对收集极结构进行优化以改善收集极的散热方式,在电子束降落处增加散焦线圈以扩大电子束的散开面积,结合这两种方式,收集极的局部最高温度为252℃,表明这些方式对降低收集极的温度是有效可行的。

The structure parameters of the electron gun are calculated by using the theory of electron cyclotron,in addition,the trajectory of the electron beam is simulated and analyzed and the structure parameters of the electron gun are optimized by using the theory of electron cyclotron.In order to ensure that the gyrotron can work stably and efficiently,the multi-physics method is used to analyze the temperature distribution of the collector of the gyrotron.Under the working parameters of the high-power gyrotron,the CST particle studio and the multi-physics field studio were used to conduct steady-state thermal analysis of the collector,and the local maximum temperature of the collector was 332℃.In order to reduce the temperature of the collector,the structure of the collector is optimized by improving the cooling method of the collector.At the same time,a defocusing coil is added to the electron beam landing area to expand the spreading area of the electron beam.Using these two improvement methods,the local maximum temperature is 252℃,indicating that these two methods are effective and feasible for reducing the temperature of the collector.