Stability of Current - Carrying Elements of Superconducting Magnets to Thermal Disturbances

  • V. R. Romanovskii
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 35)


The results of theoretical investigation of thermally fine composite superconductor stability to local thermal disturbances in variation of the external magnetic field, cooling agent temperature, improvement of superconductor critical properties are presented. It is shown that there exist regions of the magnetic field, in which the allowed energy of disturbance vary negligibly both in decreasing the helium bath temperature from 4.2K to 1.8K and in transition to superconductors with an increased critical density of the current. The analysis of the thermal stability variation in transition to high temperature superconductors shows that the increase of critical energies is of the same order as that of the capacity variation.


Critical Current Density Copper Matrix Magnetic Field Induction Composite Wire Refrigerant Temperature 
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  1. 1.
    M.N.Wilson, “Superconducting Magnets”, Clarendon Press, Oxford (1983).Google Scholar
  2. 2.
    J.E.C.Williams, “Superconductivity and its applications”, Pion Limited, London (1970).Google Scholar
  3. 3.
    V.E.Keilin, Simple equation of the critical surface of second - kind rigide superconductors, Dok. Akad. Nauk SSSR (Sov. Phys. Dokl.) 1:90 (1982).Google Scholar
  4. 4.
    V.E.Keilin et al, Development of superconducting solenoids from multifilamentary niobium - tin wires without stabilizing matrix and analysis of their thermal stability, Cryogenics, 25:462 (1985).CrossRefGoogle Scholar
  5. 5.
    S.A.Elrod et al, The specific heat of NbTi from 0 to 7T between 4.2 and 20K, “Advances in Cryogenic Engineering”, Vol. 28, Plenum Press, New York (1982), p. 601.Google Scholar
  6. 6.
    C.Schmidt, The induction of a propagating normal zone (quench) in a superconductor by local energy release, Cryogenics, 18:605 (1978).CrossRefGoogle Scholar
  7. 7.
    M.N.Hlopkin, The specific heat Nb3Sn in magnetic field from 0 to 19T, Zh. Eksp. Teor. Fiz. (JETP) 90:286 (1986).Google Scholar
  8. 8.
    I.G. Kogevnikov et al “Materials at Low Temperatures,” Mashinostroenie, Moskva, (1982).Google Scholar
  9. 9.
    L.Dresner et al, Propagation of normal zones in composite superconductors, in: “Proc. 6th Symposium on Engineering Problems of Fusion Research,”IEEE, New York (1976), p. 266.CrossRefGoogle Scholar
  10. 10.
    S.P.Cogan et al, Properties of CuSn bronze at 4.2K, Cryogenics, 20:313 (1980).CrossRefGoogle Scholar
  11. 11.
    V.R.Romanovsky, Regularity of thermal stability conditions of composite superconductors postulated by the theory of minimum propagating zone, J. Phys. P.: Appl. Phys. 18:121 (1985).Google Scholar

Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • V. R. Romanovskii
    • 1
  1. 1.I.V. Kurchatov Institute of Atomic EnergyMoscowUSSR

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