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 ›› 2018, Vol. 29 ›› Issue (3): 42 doi: 10.1007/s41365-018-0373-5

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Beam dynamics, RF measurement, and commissioning of a CW heavy ion IH-DTL

Heng Du 1,2 • You-Jin Yuan 1 • Zhong-Shan Li 1,2 • Zhi-Jun Wang 1 • Peng Jin 1 • Xiao-Ni Li 1,2 • Guo-Zhu Cai 1 • Wen-Wen Ge 1,2 • Guo-Feng Qu 1,2 • Yuan He 1 • Jia-Wen Xia 1 • Jian-Cheng Yang1 • Xue-Jun Yin 1   

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

    This work was supported by the National Natural Science Foundation of China (Nos. 11375243 and 11405237) and the Guangdong Innovative and Entrepreneurial Research Team Program (No. 2016 ZT06G373).

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Heng Du, You-Jin Yuan, Zhong-Shan Li, Zhi-Jun Wang, Peng Jin, Xiao-Ni Li, Guo-Zhu Cai, Wen-Wen Ge, Guo-Feng Qu, Yuan He, Jia-Wen Xia, Jian-Cheng Yang, Xue-Jun Yin. Beam dynamics, RF measurement, and commissioning of a CW heavy ion IH-DTL.Nuclear Science and Techniques, 2018, 29(3): 42     doi: 10.1007/s41365-018-0373-5


A 53.667 MHz CW (continuous-wave) heavy ion IH-DTL has been designed for the SSC-LINAC injector of HIRFL-CSR (Heavy Ions Research Facility at Lanzhou-Cooling Storage Ring). It accelerates ions with maximum mass-to-charge ratio of 7.0 from 143 to 295 keV/u. Low-power RF measurement of the IH-DTL1 has been taken to investigate the RF performance and the quality of the electric field distribution on the beam axis. The measured Q0 value and the shunt impedance are 10,400 and 198 MX/m, respectively. The electric field distributions on and around the beam axis were evaluated and compared with the design value. By a new approach, the dipole field component is also estimated. The beam dynamics simulation using measured field distribution was presented in this paper. Based on the dynamics analysis in both transverse and longitudinal phase space, the field distribution can meet the design requirement. Finally, the RF conditioning and very first beam commissioning on the IH-DTL1 were finished. The beam test results agree well with the simulation results; what’s more, the property of the variable output beam energy about the separated functions DTL was verified.

Key words: Linac, RF measurement, Beam dynamic simulation, Commissioning