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上海光源储存环的新工作模式和新装插入件会导致动力学孔径和注入效率的减小,传统的注入方式不再满足恒流注入要求。分别从改变注入方式和减小注入束流发射度两个角度解决注入对动力学孔径的需求。脉冲多极铁与凸轨相结合的注入方式可以将动力学孔径的要求降低到7 mm以下。利用斜四极铁在高能输运线上进行水平和垂直发射度互换可以将注入束流发射度降低到近1/10而降低注入点的束斑尺寸。两者都可以将注入效率提高到95%以上。二者在更小动力学孔径的情况下同时使用还可以减小脉冲多极铁的强度。
The new working mode of the light source storage ring in Shanghai and the new insert will result in the reduction of dynamic aperture and injection efficiency. The traditional injection method no longer satisfies the constant current injection requirement. The injection kinetic aperture needs to be addressed from two aspects: changing the injection mode and reducing the injection beam emission. The combination of pulsed multipole iron with a convex rail reduces the kinematic aperture requirement to less than 7 mm. The use of oblique quadrupoles for horizontal and vertical emissivity interchange on high-energy transport lines reduces the injected beam emission by nearly a factor of 10 and reduces the spot size at the injection point. Both can increase the injection efficiency to more than 95%. The simultaneous use of both with smaller kinetic apertures also reduces the intensity of pulsed multi-pole iron.