Author: Guo, Z.Y.
Paper Title Page
WEAO02
 Preliminary Design of a Hybrid Ion Source for 7Li+3 Generation  
 
  • S.X. Peng, J.E. Chen, Z.Y. Guo, H.T. Ren, J.M. Wen, W.B. Wu, Y. Xu, A.L. Zhang, J.F. Zhang, T. Zhang
    PKU, Beijing, People's Republic of China
  • J.E. Chen
    Graduate University, Chinese Academy of Sciences, Beijing, People's Republic of China
  • A.L. Zhang
    University of Chinese Academy of Sciences, Beijing, People's Republic of China
  
  To provide a novel directional fast-neutron via the p(7Li ,n) reaction for prompt fission γ -ray (PFG) spectra study, a hybrid 7Li3+ ion source was designed at Peking University(PKU). It is a combination of a 6.5 GHz ECR (electron cyclotron resonance) ion source and a hot surface ionization source. The surface ionization source locates inside the ECR chamber and a 500 V bias voltage is set between the hot surface and the ECR chamber. Lithium vapor from an oven is guided into the surface source through a heating transfer pipe. Li+ ions generated on the hot surface will be extracted from the surface source and striped into Li3+ with the electron impact ionization. To avoid the lithium vapor attaching on the wall of the discharge chamber, the whole plasma chamber will be heated up to 300 °C. A four-electrode extraction system will be used for Li3+ ion beam formation. Details will be presented in the paper.  
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