医用重离子加速器薄壁真空室研制  

Development of Thin-wall Vacuum Chamber for Heavy Ion Medical Accelerator

作　　者：罗成 杨伟顺[2,3,4] 谢文君[2,4] 李长春 柴振[2,3] 朱小荣 刘建龙 焦纪强 万亚鹏 蔺晓建 马向利 张喜平 蒙峻 陈叔平[1] LUO Cheng;YANG Weishun;XIE Wenjun;LI Changchun;CHAI Zhen;ZHU Xiaorong;LIU Jianlong;JIAO Jiqiang;WAN Yapeng;LIN Xiaojian;MA Xiangli;ZHANG Xiping;MENG Jun;CHEN Shuping(School of Petrochemical Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;University of Chinese Academy of Sciences,Beijing 100049,China;Huizhou Research Center of Ion Sciences,Huizhou 516003,China)

机构地区：[1]兰州理工大学石油化工学院,甘肃兰州730050 [2]中国科学院近代物理研究所,甘肃兰州730000 [3]中国科学院大学,北京100049 [4]惠州离子科学研究中心,广东惠州516003

出　　处：《原子能科学技术》2020年第11期2245-2251,共7页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(11675235)。

摘　　要：中国科学院近代物理研究所研制的医用重离子加速器装置是我国第1台拥有自主知识产权的医用重离子加速器,其高频脉冲二极磁铁使用RAMPING工作模式且磁场上升速率为1.6 T/s,所以安装在高频脉冲磁铁内的真空室采用一种薄壁加筋结构不锈钢真空室以减少涡流对离子束稳定性的影响。然而由于薄壁加筋不锈钢真空室占用磁铁气隙尺寸偏大,不仅造成了磁铁造价成本偏高,更是提高了运维成本。基于以上原因,本文提出陶瓷内衬薄壁(0.3 mm)真空室,并研制了原理样机。测试结果表明:样机真空度进入了10-10 Pa量级范围,并可有效减小磁铁气隙,是未来加速器薄壁真空室的发展方向。Heavy Ion Medical Machine(HIMM),developed by the Institute of Modern Physics,Chinese Academy of Sciences,is the first medical heavy ion accelerator with independent intellectual property rights in China.Because the RAMPING mode was used for high frequency pulse dipole magnets of HIMM and the rising rate of magnetic field is 1.6 T/s,the vacuum chamber installed in the high frequency pulsed magnet is a thin-wall stainless vacuum chamber with reinforcing ribs to reduce the influence of eddy current on the ion beam stability.However,the gap size of magnet occupied by thin-wall stainless vacuum chamber with reinforcing ribs is too large,and it not only causes the high cost of magnets,but also greatly improves the maintenance cost.Based on these reasons,a new thin-wall vacuum chamber(0.3 mm)with ceramic lining was put forward and the prototype was designed and manufactured.The test results show that the obtained pressure of the prototype is in the order magnitude of 10-10 Pa,and the magnet gap can be effectively reduced.And it is the development direction of thin-wall vacuum chamber of accelerator in the future.

关 键 词：医用重离子加速器装置 薄壁真空室 薄壁加筋 陶瓷内衬 

分 类 号：TL56[核科学技术—核技术及应用]