Details

Autor(en) / Beteiligte

• Kwon, H. J.
• Rochester, J.
• Wan, F.
• Rindfleisch, M. A.
• Tomsic, M. J.
• Sumption, M. D.
• Collings, E. W.

Titel

Critical Current Densities and n-Values of MgB2 Conductors for SMES, MRI, and Low AC Loss Applications

Ist Teil von

• IEEE transactions on applied superconductivity, 2023-08, Vol.33 (5), p.1-4

Ort / Verlag

New York: IEEE

Erscheinungsjahr

2023

Quelle

IEEE Xplore

Beschreibungen/Notizen

• Multifilamentary MgB 2 strands (filament numbers 36 to 114) prepared by the in-situ power-in-tube (PIT) route with carbon doping contents of 0, 2, and 3.2% were wound on barrels for transport J c and n -value measurement at 4.2 K in fields of up to 12 T. The strand and gauge lengths were 1 m and 0.5 m. Heat treatments at 675 °C and 650 °C centered around the melting point of Mg (650 °C) and both utilized the liquid-solid reaction. A pair of strands, with and without 2% C doping exhibited the J c (B) crossover effect. Studied were the dependencies of J c on field strength, dopant concentration, and cabling and the dependence of n -value on field strength.