Current, Carrying Capacity and Transition State of Superconducting Solenoids

  • W. F. Gauster
  • D. L. Coffey
Conference paper
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 9)


Solenoids wound with high-field superconducting wire (e.g., NbZr) display maximum currents I m and maximum fields H m , which are generally considerably less than the critical current I c of a short piece of the same wire exposed to a homogeneous transverse field of equal strength H m . This phenomenon is known as the degradation effect p], Montgomery [2] and Chandrasekhar and Hulm .[3] suggested models for predicting I m and H m of high-field superconducting solenoids. Both models consider a linear relation between the field H and the coil current I (load line) which is assumed to be identical with that of a nonsuperconducting solenoid with the same dimensions


Critical Current Critical Field Lead Wire Degradation Effect Insulation Thickness 
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  1. 1.
    J. K. Hulm, B. S. Chandrasekhar, and H. Riemersma, In Advances in Cryogenic Engineering, Vol. 8, Plenum Press, New York (1963), p. 17.Google Scholar
  2. 2.
    D. B. Montgomery, Appl Phys. Letters, 1, 41 (1962); National Magnet Lab. Rept. AFOSR-3015 (July 1962).CrossRefGoogle Scholar
  3. 3.
    B. S. Chandrasekhar and J. K. Hulm, Appl Phys. Letters, 2, 43 (1963).CrossRefGoogle Scholar
  4. 4.
    Z. J. J. Stekly, private communication.Google Scholar
  5. 5.
    B. S. Chandrasekhar, W. F. Gauster, and J. K. Hulm, Appl Phys. Letters, 2, 228 (1963).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1964

Authors and Affiliations

  • W. F. Gauster
    • 1
  • D. L. Coffey
    • 1
  1. 1.Oak Ridge National LaboratoryOak RidgeUSA

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