A New Test Facility to Characterize React and Wind MgB2 Conductor

作者：Pasquet Raphael^*; Bonelli Antoine; Berriaud Christophe; Juster Francois Paul; Przybilski Henry; Reynard Berenger; Schild Thierry; Scola Loris

来源：IEEE Transactions on Applied Superconductivity, 2014, 24(3): 1-5.

DOI：10.1109/TASC.2013.2282833

• AIN
• conduction cooling
• critical current
• MgB2
• react and wind

A new test facility was developed at CEA/Saclay in collaboration with the SigmaPhi Company in order to perform studies of a dry MgB2 magnet operating at 10 K and medium range field (1 T up to 4 T). For a rapid use of the MgB2 conductors in an industrial product, notably in the medical sector, the "react and wind" technique must be used to wind magnets. However, the reacted MgB2 conductors have a minimum winding radius, classically around 100 mm, which is incompatible with the existing Saclay test facility. A new test facility has been constructed with a 600 A de current power, a 300 mm diameter sample holder, and conduction cooling by a two-stage GM cryocooler. The background field for this test facility is provided by a NbTi coil, which has a warm bore of 350 mm and a maximum field of 3 T. This paper presents the design of this test facility, especially the design of the current leads, the insulated thermal contacts with the development of a new type of insulation based on aluminum nitride and the dry sample holder. Results or critical current tests in self-field are presented and compared with manufacturer data for a reacted MgB2 conductor, a Ni/MgB2 tape soldered on an OFHC copper stabilizer tape, supplied by Columbus Superconductors SpA.

• 出版日期2014-6
• 单位中国地震局