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VACUUM ›› 2023, Vol. 60 ›› Issue (2): 51-56.doi: 10.13385/j.cnki.vacuum.2023.02.09

• Vacuum Acquisition System • Previous Articles     Next Articles

Characteristic Analysis of Deuterium Desorption in Liquid Lithium

LI Lin1,2, MENG Xian-cai3, YUAN Jing-sheng1,2, BI Hai-lin4, ZUO Gui-zhong1, HU Jian-sheng1   

  1. 1. Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China;
    2. University of Science and Technology of China, Hefei 230026, China;
    3. Institute of Energy, Hefei Comprehensive National Science Center, Hefei 230031, China;
    4. Hefei University of Technology, Hefei 230009, China
  • Received:2022-07-30 Online:2023-03-25 Published:2023-03-27

Abstract: Lithium coating or liquid lithium provides good wall condition for Tokamak, but it has the problem of fuel retention. In order to solve this problem, it is necessary to focus on the desorption properties of hydrogen isotopes in liquid lithium. In this paper, the adsorption/desorption system of liquid lithium was designed, the absorption experiment of deuterium in liquid lithium was carried out and the desorption process was analyzed. The system pumping speed under different partial pressures of deuterium was calibrated by using a fine-tuning valve to adjust the air inlet rate, and the amount of gas pumped from the system during desorption process was calculated. The results show that the desorption peak temperature of deuterium is around 481℃, only about 36% of the desorbed deuterium gas was pumped out by the extraction system, and the rest of them was re-adsorbed by lithium condensed on the wall. This study lays a good foundation for further analysis of the desorption behavior of deuterium in liquid lithium, and provides technical support for solving the problem of fuel recovery in liquid lithium in the future.

Key words: Tokamak, lithium, hydrogen isotope, deuterium, desorption

CLC Number: 

  • TB79
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