Demonstration of a Conduction Cooled React and Wind MgB2 Coil Segment for MRI Applications

This paper is a contribution to the development of technology for a MgB2-based, cryogen-free, and superconducting magnet for an MRI system. Specifically, we aim to demonstrate that a react and wind coil can be made using a high-performance in situ route MgB2 conductor and that the conductor could be operated in conduction mode with low levels of temperature gradient. In this paper, a MgB2 conductor was used for the winding of a subsize MRI-like coil segment. The MgB2 coil was wound on a 457-mm ID 101 OFE copper former using a react-and-wind approach. The total length of the conductor used was 330 m. The coil was epoxy impregnated and then instrumented for low temperature testing. After the initial cooldown (conduction cooling), the coil Ic was measured as a function of temperature (15 K-30 K), and an Ic of 200 A at 15 K was measured.

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