Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2015, Vol. 26 ›› Issue (6): 060203 doi: 10.13538/j.1001-8042/nst.26.060203

• LOW ENERGY ACCELERATOR, RAY AND APPLICATIONS • Previous Articles     Next Articles

Transmission efficiency improvement of the injector line of SFC by particle beam decorrelation

YANG Yao,1, 2,  YUAN You-Jin , 1 FENG Yu-Chen ,1 SUN Liang-Ting,1 FANG Xing ,1 LU Wang ,1 ZHANG Wen-Hui,1 CAO Yun,1 ZHANG Xue-Zhen,1  ZHAO Hong-Wei 1   

  1. 1Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
    2University of Chinese Academy of Sciences, Beijing 100049, China
  • Supported by:

    Supported by National Basic Research Program of China (No. 2014CB845500) and the 100 Talents Program of the CAS (No. Y214160BR0) and National Nature Science Foundation of China (No. 11221064)

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YANG Yao, YUAN You-Jin, FENG Yu-Chen, SUN Liang-Ting, FANG Xing, LU Wang, ZHANG Wen-Hui, CAO Yun, ZHANG Xue-Zhen, ZHAO Hong-Wei . Transmission efficiency improvement of the injector line of SFC by particle beam decorrelation.Nuclear Science and Techniques, 2015, 26(6): 060203     doi: 10.13538/j.1001-8042/nst.26.060203


The operation of the HIRFL accelerator has shown that the beam transmission efficiency of the sector focusing cyclotron (SFC) injector line is rather poor. Beam simulations have been performed to investigate the possible causes for this low transmission. It is predicted that the property of transversal coupling of the ion beam from electron cyclotron resonance (ECR) ion source can be an important factor to degrade the beam quality by increasing the beam emittance, resulting in a serious particle loss. An improved operation scheme for the SECRAL associated line has been proposed, and the corresponding experiment was carried out. This paper presents the test results.

Key words: Electron cyclotron resonance, Emittance, Transverse, Coupling