Critical Currents of ${\rm YBa}_{2}{\rm Cu}_{3}{\rm O}_{7-\delta}$ Tapes and ${\rm Bi}_{2}{\rm Sr}_{2}{\rm CaCu}_{2}{\rm O}_{\rm x}$ Wires at Different Temperatures and Magnetic Fields

Abstract

Design studies for the cooling channel of a Muon Collider show the need for straight and helical solenoids generating fields well in excess of the critical fields of state-of-the-art Low Temperature Superconductors (LTS), such as Nb <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> Sn or NbTi. Therefore, High Temperature Superconductors (HTS) may be used for the manufacturing of all or certain sections of these magnets to generate and support the field levels required at the operating temperature of the new machine. In this work, two High Temperature Superconductors-Bi-2212 round wires and YBCO coated conductor (CC) tapes-are investigated to understand how their critical current density scales as a function of magnetic field and operating temperature.