The CEPC booster will accelerate the e−e+ beam from 10 GeV to 120 GeV, so the field of the dipole magnets will change with the beam energy, of which the minimal working field is 29 Gs whereas the maximal field is 338 Gs. To reach the requirement of high precision at lower field level, three kinds of new dipole magnets are proposed and studied. To test and verify the designs of the magnets, two subscale prototype magnets are fabricated.

中文翻译：

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CEPC 助推器原型偶极磁铁的开发

CEPC 助推器将加速e-e+束从 10 GeV 到 120 GeV，因此偶极磁体的场将随束能量而变化，其中最小工作场为 29 Gs，而最大场为 338 Gs。为满足低场级高精度的要求，提出并研究了三种新型偶极磁体。为了测试和验证磁体的设计，制造了两个亚尺度原型磁体。