Abstract
Degraded magnet performance, sometimes quite dramatic, was observed in many dipole magnets built for the SSC. A number of magnets which exhibited degraded performance fell into two classes, ingeniously referred to as type “A” and “B”. As a result of a great deal of theoretical and experimental work, considerable progress has been made toward understanding this behavior. This article reviews much of this work, and speculates as to how better magnets might be produced using the results of what we have learned.
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References
Martin N. Wilson, “Superconducting Magnets,” Oxford University Press, New York (1983), Ch. 5.
Ibid, p. 27ff.
H. Brechna, “Superconducting Magnet Systems,” Springer-Verlag, New York (1973), p. 518ff.
CH. Walters, Design of multistrand conductors for superconducting magnet windings, Brookhaven National Laboratories informal report BNL 18928 AADD 74–2(1974).
G. H. Morgan, Eddy currents in flat metal-filled superconducting braids, J. Appl. Phys. 44:3319(1973).
A. P. Verweij and H. H. J. ten Kate, Coupling currents in Rutherford cables under time varying conditions, IEEE Transactions on Applied Superconductivity, 3:146(1993).
A. A. Akhmetov, A. Devred, and T. Ogitsu, Periodicity of crossover currents in a Rutherford-type cable subjected to a time-dependent magnetic field, J. Appl. Phys. 75:3176(1994).
W. J. Carr, Jr., Interstrand Eddy Currents in an SSC Cable Based on Morgan’s Model, Westinghouse Science and Technology Center report 94–9TM0-SSCRR-M1, (1994).
W. J. Carr, Jr., “AC Loss and Macroscopic Theory of Superconductors,” Gordon and Breech, New York (1983).
W. J. Carr, Jr., and V. T. Kovachev, Interstrand eddy current losses in ssc magnets, to be published in Cryogenics (1995)
V. T. Kovachev, M. J. Neal, D. W. Capone II, W. J. Carr, Jr., and C. Swenson, Interstrand resistance of SSC magnets, Cryogenics 34:813(1994)
G. T. Mallick, Jr., J. M. Toms, W. J. Carr, Jr., and V. T. Kovachev, Eddy currents in superconducting Rutherford Cables, to be published in Cryogenics.
J. Strait et al., Quench performance of Fermi lab/General Dynamics built full length collider dipole magnets, in “Supercollider 4”, John Nonte, ed., Plenum Press, New York (1992), p.365.
A. D. Mclnturff et al., Model magnet studies, IEEE Trans. Mag. MAG21:478(1985).
J. P. Ozelis, S. Delchamps, et al., AC loss measurements of model and full size 50mm SSC collider dipole magnets at Fermilab, IEEE Trans. Appl. Superconductivity, 3:678(1993).
T. Ojitsu, Y. Zhao, A. Akhmetov, and A. Devred, Influence of cable eddy currents on magnetic field harmonics, presented at the ICFA workshop on AC superconductivity, June 23–25, 1992, KEK, Tsukuba, Japan.
A. P. Verweij, A. den Ouden, B. Sachse, and H. H. J. ten Kate, The effect of transverse pressure on the interstrand coupling loss of Rutherford type of cables, in “Advances in Cryogenic Engineering Vol 40,” R. P. Reed, editor, Plenum Press, New York, (1994), p.521.
R. I. Schermer, Operation of magnets with heat deposition in the windings, SSCL Report MD-TA- 173(1991)
W. J. Carr, Jr., Contribution of ramped field loss to quench current degradation in SSC magnets., Westinghouse Science and Technology Center report 94–9TM0,SSCRR-M4(1994).
R. I. Schermer, Status of superconducting magnets for the superconducting super collider, IEEE Tran. Mag. 30:1587(1994).
J. M. Butler, C. A. Swenson, and W. J. Carr, Jr., Progress in understanding ramp rate sensitivity in high energy booster dipole magnets, in “Supercollider 5”, P. Hale, ed., Plenum Press, New York (1994), p.821.
W. J. Carr, Jr., G. T. Mallick, Jr., and V. T. Kovachev, Theory of quench current in B-type SSC magnets, Westinghouse Science and Technology Center report 94-TM0-SSCRR-M3(1994).
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Mallick, G.T. (1996). Ramp Rate Sensitivity in Accelerator Magnets. In: Summers, L.T. (eds) Advances in Cryogenic Engineering Materials . Advances in Cryogenic Engineering Materials , vol 42. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9059-7_156
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DOI: https://doi.org/10.1007/978-1-4757-9059-7_156
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