不同热源模型对X光管靶材温度场的影响  

Influence of Different Heat Source Models on the Temperature Field of X-Ray Tube Target

作　　者：胡青云 杨强[1] 敖海麒 王磊[1] 王二彦 邵洋 HU Qingyun;YANG Qiang;AO Haiqi;WANG Lei;WANG Eryan;SHAO Yang(Applied Nuclear Technology in Geosciences Key Laboratory of Sichuan Province,Chengdu University of Technology,Chengdu Sichuan 610059)

机构地区：[1]成都理工大学地学核技术四川省重点实验室,四川成都610059

出　　处：《宁夏师范学院学报》2018年第7期44-50,共7页Journal of Ningxia Normal University

基　　金：国家自然科学基金(41504139);四川省教育厅自然科学基金(15ZB0069)

摘　　要：针对端窗透射微型X光管阳极靶材,分析了真空中靶材的热效应,建立了镀层旋转高斯体热源模型和均匀圆柱体热源模型,利用有限元分析软件ANSYS建模,采用不同热源模型模拟靶材温度场的分布,并给出不同热源模型下靶材在不同焦半径时的导热情况.实验模拟结果表明:输入功率一定时,采用两种热源模型能够得到基本一致的温度场,高温区均呈半椭球状;焦斑一定时,两种热源模型靶材中心温度均随输入功率成正比增加.当焦半径小于50μm时,两种热源模型温差达到300℃,在焦半径值在50μm附近时,两种热源模型靶材中心温度均会发生巨大变化.当焦半径大于50μm时,两种热源模型靶材中心温度相差不大.The thermal effect of the target material in vacuum is analyzed for the transmission of the anode target of the micro X-ray tube in the end window. The heat source model of the rotating Gauss body for the coating and the heat source model of the uniform cylinder are established. Using the finite element analysis software ANSYS,different heat source models are used to simulate the distribution of the temperature field of the target,and heat conduction of the target with different focal radius under different heat source models is given. Results show that when the input power is constant,two kinds of heat source models get basically the same temperature field,and the high temperature region is all semi ellipsoid. For both models,the temperature at target center increases as input power is higher for the same focal spot. When the radius of the focal spot is less than 50 μm,temperature difference of the two heat source models reaches 300 ℃. When the focal radius is near 50 μm,the central temperature of the target material changes abruptly for both models. When the focal radius is larger than 50 μm,the center temperature for the two heat source models is close.

关 键 词：靶材 热传导 温度场 焦斑 

分 类 号：TN244[电子电信—物理电子学]