摘要
为了解决当前Gantry治疗装置面临的难题—磁体质量庞大,运行成本昂贵,提出了一种新型的斜螺线管型线圈结构。目前,已经完成了一台2.5 T用于重离子Gantry的NbTi超导磁体样机设计,与质子Gantry相比,其有效缩减了磁体的尺寸和质量。该磁体由10层斜螺线管线圈组成,工作电流为1000 A。线圈孔径为176 mm,其中好场区达到孔径的2/3。由于线圈形状的特殊性,其端部结构无需优化,各高阶谐波量沿轴向积分为零。磁体采用传导冷却的方式,保证其在旋转的情况下安全稳定运行。从斜螺线管线圈的概念出发,详细介绍斜螺线管型超导二极磁体的磁场设计,借助于ANSYS有限元分析软件,仿真了超导磁体和冷屏的空间温度场,得到磁体低温系统的热分布,最后简要介绍磁体的加工情况。
To solve the problems of huge magnet weight and expensive operation of Gantry therapy device,this paper proposes a new type of coil structure based on tilted solenoids.We have completed a 2.5 T NbTi superconducting magnet prototype design for heavy ion Gantry,which effectively reduces the gantry’s size and weight of the magnet compared to the proton therapy.The magnet consists of 10 layers of tilted solenoids with operating current of 1000 A.The coil clear bore is 176 mm in diameter and the good field region can be up to 2/3 of the aperture.Because of the magnet’s special shape,it doesn’t require optimization and higher order harmonics naturally integrate to zero through the ends.To ensure safe and stable operation of the magnet in the case of rotation,it uses the conduction cooling form.Starting from the concept of tilted solenoid coil,the magnetic field design is reported in detail.Based on ANSYS thermal FEM software,we simulate the temperature profiles inside the magnet and the thermal shield and obtain the thermal distribution of magnet cryogenic system.Finally,we give a brief introduction about the magnet processing.
作者
梁羽
马力祯
吴巍
吴北民
施建军
陈玉泉
梅恩铭
Liang Yu;Ma Lizhen;Wu Wei;Wu Beimin;Shi Jianjun;Chen Yuquan;Mei Enming(Institute of Modem Physics,Chinese Academy of Sciences,Lanzhou 730000,China;University of Chinese Academy of Sciences,Beijing 100049,China;Lanzhou Kejin Taji Corporation,Ltd,Lanzhou 730000,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2018年第11期3444-3450,共7页
Rare Metal Materials and Engineering
