Investigations Concerning the Stability of Supercritical Helium Forced-Flow-Cooling in Secondary Circuits with Cold Helium Pumps

  • Xu Cheng
  • Wolfgang Lehmann
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 39)


In the KfK-HELITEX facility comparative studies are being performed on helium forced-flow-cooling with the JT flow of the refrigerator and in the closed secondary cooling circuit using cold pumps. A number of advantages are in favor of forced-flow-cooling of s.c. magnets within pressure-controlled secondary circuits. Investigations carried out quite recently concerned the cooling stability in case of supercritical He I forced-flow-cooling within a closed secondary circuit under disturbing thermal loads. The effects of the delivery characteristic of two different helium pumps and of the helium pressure level have been determined.


Mass Flow Centrifugal Pump Heating Power Piston Pump Pump Mode 
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Copyright information

© Springer Science+Business Media New York 1994

Authors and Affiliations

  • Xu Cheng
    • 1
  • Wolfgang Lehmann
    • 1
  1. 1.Kernforschungszentrum Karlsruhe (KfK)Institut für Technische PhysikKarlsruheGermany

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