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Influence of the spacers on the stability of channel cooled superconducting coils | IEEE Journals & Magazine | IEEE Xplore

Influence of the spacers on the stability of channel cooled superconducting coils


Abstract:

In a previous paper, the thermal stability of channel cooled superconducting magnets was experimentally studied. Stable normal zones were observed within a range of curre...Show More

Abstract:

In a previous paper, the thermal stability of channel cooled superconducting magnets was experimentally studied. Stable normal zones were observed within a range of currents and local disturbance energies. Usual theories fail to fully explain these results, owing to the fact that they take into account a heat transfer to liquid helium only function of the temperature of the conductor, whatever the position is. In a simplified theoretical analysis, it is shown that in a locally uncooled superconducting wire several stationary normal zones can exist. A criterion is derived that yields the recovery current as a function of the length of the uncooled region. Besides, a detailed numerical analysis determines the evolution of a normal zone in a channel cooled magnet. Theoretical calculations are compared with experimental results.
Published in: IEEE Transactions on Magnetics ( Volume: 17, Issue: 1, January 1981)
Page(s): 1079 - 1082
Date of Publication: 06 January 2003

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