Architecture and Transport Properties of Multifilamentary MgB2 Strands for MRI and Low AC Loss Applications

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TASC2632419.pdf (603.95 KB)

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2017

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IEEE

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Abstract

Abstract—Standard in-situ type MgB2 strands manufactured by Hyper Tech Inc have 19 – 36 subelements, a monel outer sheath, and a Cu interfilamentary matrix. Typical transport Jcs of the strands are 2×105 A/cm2 with n-values of 20 – 30 at 4.2 K and 5 T. This work introduces two new MgB2 conductor designs. First, a new class of MgB2 strand is designed for magnetic resonance imaging applications. This type has a higher Cu content designed to enhance protection of a magnet wound with it, and a larger diameter to increase the critical current. Second, a new class of low AC loss MgB2 strand with high filament count and a high resistance matrix is discussed. Transport properties at 4.2 K and fields up to 10 T are reported. Optical techniques are used to study the macro- and micro-structures of these MgB2 strands.

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MgB2, MRI

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Published version: IEEE Transactions on Applied Superconductivity (Volume: 27, Issue: 4, June 2017) Article Sequence Number: 6200105. https://doi.org/10.1109/TASC.2016.2632419

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http://hdl.handle.net/1811/88137

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Research and Scholarship (CSMM)