Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Superconductive type
Patent
1986-09-09
1988-02-23
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Superconductive type
361 19, H01F 722
Patent
active
047273461
ABSTRACT:
A magnet coil (30) comprises at least one first winding made of wire (34) which is superconductive at operating temperature and at least one second winding made of normally conductive wire (36). In addition, means are provided for supplying a current into the second winding, which is completely dead during superconductive operation of the magnet coil (30), when at least certain sections of the superconductive wire (34) assume the normally conductive state.
In order to accelerate the spatial propagation of this transition in the magnet coil (30) and at the same time to provide the possibility to use low-cost wires having a relatively small proportion, related to the cross-sectional area, of normally conductive material, the first and the second winding are connected in parallel electrically.
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patent: 4336561 (1982-06-01), Murphy
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Article entitled "Superconducting Coil Degradation", published in the Journal of Applied Physics, (1965) by B. Taquet, p. 3251.
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Article entitled "Design and Development of the US-TESPE Toridal Coil", published in the Proceedings of the Seventh International Cryogenic Engineering Conference, (1978); IPC Science and Technology Press, by Mitchell O. Hoenig, pp. 156-172.
Cryogenics, Dec. 1976, pp. 705 to 708, Mulhall et al, "Protection of Superconducting Coils by Means of a Secondary Winding".
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The Review of Scientific Instruments, vol. 34, No. 4, Apr. 1963, pp. 368 et seq., P. F. Smith, "Protection of Superconducting Coils".
Textbook by M. N. Wilson, "Superconducting Magnets", Oxford 1983, pp. 228 and 229.
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Leaflet entitled "3S-LMI", from Messrs. La Metalli Industriale.
Muller Wolfgang H.
Westphal Michael
Bruker Analytische MeBtechnik GmbH
Harris George
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