Field mapping system for cyclotron magnet
Field mapping system for cyclotron magnet
复制标题
DOI：
10.1016/j.nima.2005.02.009
复制
发表时间：
2005-06
影响因子：
1.4
通讯作者：
Ki-Hyeon Park;Young-Gyu Jung;D. E. Kim;B. Kang;M. Yoon;J. Chai;Young-Soo Kim
中科院分区：
文献类型：
--
作者：
Ki-Hyeon Park;Young-Gyu Jung;D. E. Kim;B. Kang;M. Yoon;J. Chai;Young-Soo Kim
本文介绍了一个霍尔探头映射系统测量回旋加速器磁铁，这已被制造的13 MeV回旋加速器在韩国放射医学科学研究所。两个霍尔探头安装在精密机械x-y平台上，并在笛卡尔坐标系中绘制磁场。测绘系统采用“飞行”模式野外测绘方法，减少了数据采集时间。测量整个回旋加速器磁体间隙区所需时间约为60 min。沿束流轨道沿着平均磁场的相对测量误差小于0.02%。利用现场测量数据对回旋加速器磁体进行了校正，校正后的回旋加速器总相位偏移小于±15°，在总相位偏移±20°的公差范围内。
This paper presents a Hall probe mapping system for measuring a cyclotron magnet, which has been fabricated for the 13MeV cyclotron at the Korea Institute of Radiological and Medical Sciences. Two Hall probes are mounted on a precision mechanical x–y stage and map magnetic field in the Cartesian coordinate system. The mapping system uses the ‘flying’ mode field mapping method to reduce data-acquisition time. The time required for mapping the whole gap-area of the cyclotron magnet is ∼60min. The relative measurement error for the averaged magnetic field along beam orbit is less than 0.02%. The cyclotron magnet has been corrected using field measurement data, and the achieved total phase excursion of the cyclotron after correction is less than ±15°, which is within the tolerance of ±20° for the total phase excursion.