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Accurate calculation of field quality in conventional straight dipole magnets

Radiation Detection Technology and Methods 2018年第1期2卷 93-98页

作者： Yingshun Zhu Fusan Chen Wen Kang Wan Chen Mei Yang Xi Wu Key Laboratory of Particle Acceleration Physics and Technology Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Science Beijing 100049China Dongguan Campus Institute of High Energy PhysicsChinese Academy of SciencesDongguan 523803China

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 *** this paper,an improved method for straight dipole magnets aiming at obtaining accurate field quality is *** The field quality is calculated by taking into account the relationship of the good field region to the magnet straight *** 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 *** result of the improved method is also compared with the field quality calculated along particle trajectory in *** 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 *** 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

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