质子束流输运线偏转磁铁Hall磁测系统设计研究

The Research and Design of Hall Magnetic Measurement System for Deflection Magnet of Proton Beam Transportation Line

研究设计了应用于质子治疗装置束流输运线偏转磁铁的Hall磁测系统。该Hall磁测系统包括三维运动控制模块和数据采集模块,以及计算机上位机控制软件组成。通过上位机控制软件自动控制采集系统的高精度运动及数据采集,提升了系统的自动化程度、定位精度、测量精度和测量效率。并对质子治疗系统输运线偏转磁铁进行了实测验证,主要测量了二极磁铁的励磁曲线,横向磁场均匀性和积分磁场均匀性,与磁铁的有限元仿真分析结果进行了对比,在确保偏转磁体性能要求的同时,验证了该磁测系统的可靠性。

Hall magnetic measurement system was designed for dipole magnet in proton therapy device in this research. The Hall magnetic measurement system was mainly consisted of three-dimensional motion part,data acquisition part and computer control software. The high precision movement and data acquisition of the system were automatically controlled by the computer control software. It improved the degree of automation,measuring accuracy and measuring efficiency of the system. Then magnetic measurement was carried out for the dipole magnet of the proton therapy system. The excitation curve, transverse magnetic field uniformity and integral magnetic field uniformity of the magnet were measured. And the magnetic measurement results of the magnet will be compared with that of finite element simulation. Finally, the reliability of the magnetic measurement system was verified while ensuring the requirements of dipole magnet.