Recent Development and Status of Ex-Situ PIT MgB<sub>2</sub> Wires at ASG Superconductors
Tiziana Spina, Alberto Ansaldo, A. Tumino, Paola Mauceri, Simone Pasini, Christian-Éric Bruzek, M. Tropeano, G. Grasso
Abstract
Nowadays, ex-situ Powder-In-Tube (PIT) MgB <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> multifilamentary wires are commercially available in long length and can reach self-field critical current (I <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">c</sub> ) values above 1000 A at 20K; moreover, thanks to its high critical temperature T <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">c</sub> (38K) such wires are good candidates for cryogen-free applications and devices required for the future. In the past, MRI system has already profited from these advantages and turned out to a series production of open MRI systems. Recently, this type of conductor has been chosen in the European project SCARLET for demonstrating the feasibility of a 500MW DC monopolar cable system transferring 20kA at 25kV and, at the same time, distributes LH <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> . In addition, MgB <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> is the most lightweight superconductor among the realm of practical superconductors thus to be also suitable for aircraft components.In this work, the current state-of-the-art of the commercial ex-situ PIT MgB <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> wires at ASG superconductors is reported and perspectives and challenges for their improvements over the next years is discussed.