Author: Lu, D.
Paper Title Page
MOPFI066 An Ultra-Low Energy Electron Beam Ion Trap in Shanghai 434
 
  • J. Xiao, R. Hutton, X. Jin, D. Lu, B. Tu, Y. Yang, R. Zhao, Y. Zou
    Fudan University, Shanghai, People's Republic of China
 
  Electron beam ion traps (EBITs) are very useful tools for disentanglement studies of atomic processes in plasmas. In this paper, a new ultra-low energy EBIT, SH-HtscEBIT, is reported. This EBIT can operate in the electron energy range of 30–4000 eV, with a current density of up to 100 A/cm2. The low energy limit of this machine is 30 eV, which is the lowest energy among the EBITs around the world. The maximum magnetic field in the central drift tube region of this EBIT is around 0.25 T, produced by a pair of high temperature superconductor coils. This EBIT is set up for the purpose of disentangling spectroscopic studies of edge plasmas relevant to magnetic fusion devices, and of astro-plasmas. All the elements for the spectroscopic studies can be injected through an injection system. Both the design and the performance of this EBIT are presented.  
 
MOPFI082 Redesign and Development of the Shanghai Electron Beam Ion Trap 467
 
  • D. Lu, Y. Shen, Z. Shi, J. Xiao, Y. Yang, Y. Zou
    Fudan University, Shanghai, People's Republic of China
 
  Over the last few years the Shanghai Electron Beam Ion Trap (EBIT) has been successfully redesigned and rebuilt. The original machine, developed under collaboration with the Shanghai Institute of Nuclear and Applied Physics, first generated an electron beam in 2005. Shanghai EBIT could be operated with electron beam energies between 1 and 130 keV and currents up to 160 mAmps. After several years of operation, it was found that some improvements/modifications to the old design were necessary. This contribution will discuss several of the main aspects of the redesigned Shanghai EBIT. So far it has been operated up to an electron energy of 40 keV with an current density of over 2400 A per square cm. The new EBIT is made primarily from Titanium instead of Stainless Steel and has an order of magnitude better background vacuum, a more efficient and economical cryogenic system, and also excellent optical alignment. Finally the magnetic field in the central drift tube region can reach up till 4.8 T.