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 (4): 51 doi: 10.1007/s41365-018-0384-2

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

Transport characteristics of space charge dominated multi- species deuterium beam in electrostatic low-energy beam line

Xiao-Long Lu 1,2 • Yu Zhang 1,2 • Jun-Run Wang 1,2 • Zhi-Wu Huang 1,3 • Zhan-Wen Ma 1 • Yao Yang 3 • Ze-En Yao 1,2   

  1. 1 School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
    2 Engineering Research Center for Neutron Application, Ministry of Education, Lanzhou University, Lanzhou 730000, China
    3 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
  • Contact: Xiao-Long Lu
  • Supported by:

    This work was supported by the Fundamental Research Funds for the Central Universities (No. lzujbky-2017-93), the National Natural Science Foundation of China (Nos. 11375077, 11027508, and 21327801), and the National Key Scientific Instrument and Equipment Development Projects (No. 2013YQ04086101).

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Xiao-Long Lu, Yu Zhang, Jun-Run Wang, Zhi-Wu Huang, Zhan-Wen Ma, Yao Yang, Ze-En Yao. Transport characteristics of space charge dominated multi- species deuterium beam in electrostatic low-energy beam line.Nuclear Science and Techniques, 2018, 29(4): 51     doi: 10.1007/s41365-018-0384-2


The transport characteristics of a space chargedominated multi-species deuterium beam consisting of D1+ , D2+, and D3+ particles in an electrostatic low-energy beam line are studied. First, the envelope equations of the primary D1+ beam are derived considering the space charge effects caused by all particles. Second, the evolution of the envelope of the multi-species deuterium beam is simulated using the PIC code TRACK, with the results showing a significant effect of the unwanted beam on the transport of the primary beam. Finally, different injected beam parameters are used to study beam matching, and a new beam extraction system for the existing duoplasmatron source is designed to obtain the ideal injected beam parameters that allow a D1+ beam of up to 50 mA to pass unobstructed through the electrostatic low-energy beam transport line in the presence of an unwanted (D2+ , D3+) beam of 20 mA; at the same time, distortions of the beam emittance and particle distributions are observed.

Key words: Envelope equation, Space charge effects, Multi-species beam, Electrostatic LEBT