An Automatic Liquid Nitrogen Distribution System for Twenty-Five Cold Traps

  • J. H. Fretwell
  • J. R. Bartlit
Conference paper
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 11)


The filling of individual liquid nitrogen cold traps manually or automatically from 50-liter dewars had been standard practice since 1951 at the Los Alamos Scientific Laboratory’s accelerator facility. Many LN2 traps are employed in the high-vacuum system between the oil diffusion pumps and the high vacua required in the accelerator beam tubes.


Cold Trap Heat Leak Vent Valve Upjohn Company Foam Insulation 
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  1. 1.
    R. M. Neary, “Air Condensing Cryogenic Fluids,” presented at National Safety Congress (October 31, 1963).Google Scholar
  2. 2.
    P. J. Perkins and J. B. Esgar, A.I.A.A. Structures and Materials CP8:361 (1964).Google Scholar

Copyright information

© Springer Science+Business Media New York 1966

Authors and Affiliations

  • J. H. Fretwell
    • 1
  • J. R. Bartlit
    • 1
  1. 1.Los Alamos Scientific LaboratoryUniversity of CaliforniaLos AlamosUSA

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