Abstract
A superconducting multilayer coil usingCuNb/Nb3Sn wire was fabricated by the pre-bent react-and-wind (R&W) method. The pre-bent R&Wmethod is a combination of the pre-bending treatment and the conventional R&W process. A0.8% pre-bending strain was applied by ten fixed pulleys. The coil was tested inmagnetic fields of 14, 12, 11 and 10 T at 4.2 K. The coil quench current achieved100% load ratio of the short sample critical current in the 14 T back-up field. Thequench current of the outer section coil achieved 100% of the short sample criticalcurrent in the 12 T back-up field. The coil quench currents in various magneticfields are discussed from a hoop stress and mechanical disturbance point of view.
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