【作者】 崔爱军； 韩广文； 朱志斌； 刘保杰； 杨誉； 刘秀莹； 吕约澎；

【Author】 CUI Ai-jun;HAN Guang-wen;ZHU Zhi-bin;LIU Bao-jie;YANG Yu;LIU Xiu-ying;LV Yue-peng;China Institute of Atomic Energy;

【机构】 中国原子能科学研究院；

【摘要】 随着辐照技术的不断发展,辐照工业对电子束转换X射线提出迫切需求,源于X射线具有能量高、方向集中、穿透力强、利用率高、安全可靠等特点。若能将大功率的10 MeV电子束转换成X射线,其辐照加工应用市场面将进一步扩展。转换靶是韧致辐射X射线产生的关键部件,它的性能特点决定了所产生X射线的品质以及整个设备的运行电子束转换成X射线的过程中大部分能量都将以热的形式释放,为此靶材热负载分布较为复杂,在一定的体积内解决大功率X射线转换的散热问题,实现冷却剂在靶体有限体积和厚度条件下高效热交换的设计具有重要意义。基于能量为10 MeV的高能量、高功率电子直线加速器,开展束流扫描状态下的转换靶设计工作,选取钨为靶材,采用蒙特卡洛模拟方法优化计算靶材厚度,并给出转化靶产生X射线的剂量分布及能谱分布。对转换靶进行水冷结构设计,利用有限元分析软件对冷却效果进行仿真计算,并对转换靶结构进行力学分析,保证其结构设计可靠,进而最终完成转换靶的总体设计。更多还原

【Abstract】 With the development of irradiation technology,the irradiation industry has put forward an urgent demand for electron beam conversion of X-ray,which stems from the characteristics of high energy,concentrated direction,strong penetration,high utilization,safety and reliability of X-ray.If the high-power of electron beam with 10 MeV can be converted into X-ray,its irradiation processing application market will be further expanded.The conversion target is the key component of bremsstrahlung X-ray generation.Its performance characteristics determine the quality of the X-ray generated and the operation of the entire equipment.Most of the energy will be released in the form of heat in the process of converting the electron beam into X-ray.For this reason,the thermal load distribution of the target is relatively complex.It is of great significance to solve the heat dissipation problem of high-power X-ray conversion in a certain volume,and to realize the design of efficient heat exchange of the coolant under the limited volume and thickness of the target.Based on the high-energy and high-power electron linear accelerator with energy of 10 MeV,the design of the conversion target under the beam scanning state is carried out.Tungsten is selected as the target material,and the thickness of the target material is optimized by Monte Carlo simulation method,and the dose distribution and energy spectrum distribution of the X-ray generated by the conversion target are given.The water-cooled structure of the transfer target is designed, the cooling effect is simulated and calculated by finite element analysis software, and the mechanical analysis of the transfer target structure is carried out to ensure the reliability of its structure design,and then the overall design of the transfer target is finally completed.更多还原