Applied Science and Convergence Technology

The Korean Vacuum Society (한국진공학회)
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Introduction to Helium Leak Detection Techniques for Cryogenic Systems

  • Kim, Heetae (Rare Isotope Science Project, Institute for Basic Science) ;
  • Chang, Yong Sik (Department of e-Business, Hanshin University) ;
  • Kim, Wookang (Rare Isotope Science Project, Institute for Basic Science) ;
  • Jo, Yong Woo (Rare Isotope Science Project, Institute for Basic Science) ;
  • Kim, Hyung Jin (Rare Isotope Science Project, Institute for Basic Science)
  • Received : 2015.07.01
  • Accepted : 2015.07.10
  • Published : 2015.07.30
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Abstract

Many welding processes are performed to construct cryogenic system. Leak-tight for the cryogenic system is required at low temperature environment. Helium leak detection techniques are commonly used to find leak for the cryogenic system. The helium leak detection techniques for spraying, sniffing and pressurizing techniques are introduced. High vacuum is also necessary to use helium leak detector. So, types of fluid flow, effective temperature, conductance and pumping speed are introduced for vacuum pumping. Leak test procedure is shown for pipe welding, cryomodule and low temperature test. Cryogenic seals which include copper gasket, helicoflex gasket and indium are investigated.

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References

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