摘要
回旋加速器中的超导磁体由于加工和安装误差会在垂直方向上存在偏移现象.该现象导致加速器内磁场偏离设计,影响束流的有效加速.目前测量超导磁体的垂直偏移主要依靠机械测量和力学传感器监控,这些方法只能在工程上确定超导磁体是否对中,而最后的对中效果仍需要通过磁场测量确认.基于中俄正在联合研制的200 MeV超导质子回旋加速器SC200,详细阐述直接利用其中平面平均径向场相对变化计算超导磁体垂直偏移的过程.对比模拟和实验的数据表明,该方法能够将主加速区中平面的平均径向场控制在±1 Gs以内,即实现了超导磁体在垂直方向上的对中,为SC200的研制奠定了扎实的基础,也为其他回旋加速器中超导磁体的位置调整提供了参考.
Due to the machining and installing errors,superconducting magnet in cyclotron will generate the vertical offset,causing that the magnetic field deviates from our designation and influencing the effective acceleration of beam.Currently,the vertical offset of superconducting magnet is usually measured in engineering or monitored by mechanical sensors.These methods can only determine the alignment of superconducting magnet in engineering,and the final alignment effect needs to be confirmed by magnetic field measurements.Based on the SC200,a 200 MeV superconducting proton cyclotron being jointly developed by China and Russia,this paper describes in detail the process of calculating the vertical offset of superconducting magnets by means of directly researching the relative alterations of average radial field in cyclotron.Comparing the simulated and experimental data indicates that this method can control the averaged radial field in the median plane of main accelerated region within±1 Gs,which means that the superconducting magnets can be aligned vertically,laying a solid foundation for the development of the SC200 cyclotron and providing a reference for positional adjustment of superconducting magnets in other cyclotrons.
作者
许世文
李君君
王重
周健
丁开忠
陈永华
杜双松
Xu Shiwen;Li Junjun;Wang Zhong;Zhou Jian;Ding Kaizhong;Chen Yonghua;Du Shuangsong(Institute of Plasma Physics,Chinese Academy of Sciences,Hefei,230031,China;Hefei CAS Ion Medical and Technical Devices Co.,Ltd,Hefei,230088,China)
出处
《南京大学学报（自然科学版）》
CAS
CSCD
北大核心
2021年第5期881-886,共6页
Journal of Nanjing University（Natural Science）
基金
中俄超导质子加速器联合设计(1604b0602005)。
作者简介
通讯联系人:李君君,E⁃mail:lijunjun73@ipp.ac.cn。
