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This paper presents the results of a stability experiment on a NbTi triplet in conduit conductor ten metres long. This cable was cooled with a helium forced flow. Inductive heating enabled the deposition of large heat quantities over the whole length of the conductor. The experiments were divided into two parts. The first experiment allowed the determination of ac losses of the conductor by measuring the dissipated energy in a superfluid helium bath, for different magnetic field variations (deltaBmax less than 1 tesla) and pulse durations (tau greater than 20 ms). The second experiment, with supercritical helium, allowed the investigation of the minimum energy to quench the conductor in relation to the transport current (Imax = 3.5 kA), for a given external magnetic field (Bmax = 9 teslas) and given refrigeration conditions.

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Authors: MARTINEZ A, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR);CIAZYNSKI D, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR);TURCK B, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: Paper presented: 1992 Applied Superconductivity Conference, Chicago (US), August 23-28, 1992
Availability: Available from (1) as Paper EN 37079 ORA
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