Study of new injection schemes for the SSRF storage ring

Manzhou ZHANG; Shunqiang TIAN; Kun WANG; Qinglei ZHANG; Bocheng JIANG

doi:10.11889/j.0253-3219.2017.hjs.40.110101

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Study of new injection schemes for the SSRF storage ring

SYNCHROTRON RADIATION TECHNOLOGY AND APPLICATIONS | 更新时间：2021-05-19

- Study of new injection schemes for the SSRF storage ring
  封面论文
- NUCLEAR TECHNIQUES Vol. 40, Issue 11, Article number: 110101(2017)
- 作者机构：
  
  中国科学院上海应用物理研究所张江园区上海 201204
- 作者简介：
- 基金信息：
  
  National Key Research and Development Program;the Young Scholars Innovation Association, Chinese Academy of Sciences
- DOI：10.11889/j.0253-3219.2017.hjs.40.110101
  CLC： TL51
- Received：22 January 2017，
  
  Revised：16 April 2017，
  
  Published：10 November 2017
- 稿件说明：
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Manzhou ZHANG, Shunqiang TIAN, Kun WANG, et al. Study of new injection schemes for the SSRF storage ring[J]. Nuclear techniques, 2017, 40(11): 110101
DOI：

Manzhou ZHANG, Shunqiang TIAN, Kun WANG, et al. Study of new injection schemes for the SSRF storage ring[J]. Nuclear techniques, 2017, 40(11): 110101 DOI： 10.11889/j.0253-3219.2017.hjs.40.110101.

摘要

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7mm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。

Abstract

Background

Several new operation modes were designed and commissioned in Shanghai synchrotron radiation facility (SSRF)

and these new modes and insertion devices reduced the dynamic aperture and the injection efficiency of the storage ring.

Purpose

This study aims to improve the injection efficiency of SSRF store ring.

Methods

A new injection scheme employing multipole magnet and injection emittance reducing at the high energy transport line have been studied.

Results

Pulsed multipole magnet with orbit bump reduced the dynamic aperture to less than 7mm. Emittance exchange

by installing skew quadrupoles at the high energy transport line

scaled-down the horizontal emittance by an order

and then reduce the injection beam size. Both methods can increase the injection efficiency to higher than 95%.

Conclusion

The new injection scheme with emittance reduction showed efficiency to improve the injection. The two methods also can work together to reduce the strength of pulsed multipole magnet or for smaller dynamic aperture.

关键词

Keywords

references

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