Accurate calculation of field quality in conventional straight dipole magnets  

作　　者：Yingshun Zhu Fusan Chen Wen Kang Wan Chen Mei Yang Xi Wu 

机构地区：[1]Key Laboratory of Particle Acceleration Physics and Technology,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China [2]University of Chinese Academy of Science,Beijing 100049,China [3]Dongguan Campus,Institute of High Energy Physics,Chinese Academy of Sciences,Dongguan 523803,China

出　　处：《Radiation Detection Technology and Methods》2018年第1期93-98,共6页辐射探测技术与方法（英文）

摘　　要：Purpose In the standard design method of straight dipole magnets,the good field region is symmetric to the magnet mechanical center both in 2D and in 3D,so the obtained field quality is not the actual one because the field integration lines are not consistent with the curved beam paths.In this paper,an improved method for straight dipole magnets aiming at obtaining accurate field quality is proposed.Methods The field quality is calculated by taking into account the relationship of the good field region to the magnet straight geometry.General description of the improved method is introduced,and two application examples of straight dipole magnets are presented to investigate the detailed field quality difference between the improved and traditional methods.The result of the improved method is also compared with the field quality calculated along particle trajectory in OPERA-3D.Results It is shown that the difference in field quality between the improved and traditional methods cannot be neglected,and the field quality in the improved method is very close to the one calculated along real beam paths.Conclusion The field quality in the improved method is accurate enough for practical application in a straight dipole magnet.

关 键 词：ACCELERATOR Straight dipole magnet Field simulation Beam sagitta Field quality 

分 类 号：TM2[一般工业技术—材料科学与工程]