Nuclear Techniques ›› 2017, Vol. 40 ›› Issue (11): 110101-110101.doi: 10.11889/j.0253-3219.2017.hjs.40.110101


Study of new injection schemes for the SSRF storage ring

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

  1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Zhangjiang Campus, Shanghai 201204, China
  • Received:2017-01-22 Revised:2017-04-16 Online:2017-11-10 Published:2017-11-08
  • Supported by:
    Supported by National Key Research and Development Program (No.2016YFA040200) and the Young Scholars Innovation Association, Chinese Academy of Sciences (No.20150210)

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.

Key words: Injection efficiency, Injection by pulsed multipole magnet, Emittance exchange

CLC Number: 

  • TL51