Journal of Northeastern University Natural Science ›› 2020, Vol. 41 ›› Issue (7): 962-967.DOI: 10.12068/j.issn.1005-3026.2020.07.009

• Mechanical Engineering • Previous Articles     Next Articles

Simulation Investigation on Discharge and Ion Transport of Pumping Units for Sputter Ion Pumps

NING Jiu-xin, HUANG Hai-long, WANG Xiao-dong, SUN Hao   

  1. School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, China.
  • Received:2019-06-25 Revised:2019-06-25 Online:2020-07-15 Published:2020-07-15
  • Contact: WANG Xiao-dong
  • About author:-
  • Supported by:
    -

Abstract: Based on the finite element method(FEM), the discharge and ion transport processes of the sputter ion pumping units were studied. The plasma module, the magnetic field module, and the charged particle tracking module were coupled by COMSOL Multiphysics. The distribution law of electron density in the anode cylinder was obtained. The effects of parameters such as pressure, anode voltage and magnetic field strength on electron density were investigated. The trajectories of the ions at different pressures were tracked, and the impact energy and angle of the ions to the cathode plates were obtained. The obtained parameters were then applied to the theoretical pumping speed calculation and the results were compared with the experimental pumping speed. They have good consistency and verify the accuracy of the simulation model, which provides a suitable method for structural design and performance optimization of sputter ion pumps.

Key words: sputter ion pump, ion transport, multiphysics coupling, simulation analysis, pumping speed

CLC Number: