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A major problem of state-of-the-art Nb3Sn accelerator magnets is their long training due to thermo-mechanical perturbations. Increasing the specific heat, <italic>Cp</italic>, of the Rutherford cable would reduce and&#x002F;or eliminate training by limiting the coils temperature rise. This paper studies feasibility of increasing the <italic>Cp</italic> of Rutherford-type cables by using thin composite Cu&#x002F;Gd2O3 and Cu&#x002F;Gd2O2S tapes produced by Hyper Tech Research, Inc. The tape can be either wrapped around the cable, placed on the cable wide faces under the insulation, and&#x002F;or inserted as a core. Wire samples outfitted with these high-<italic>Cp</italic> ribbons, or tapes, were prepared and tested at FNAL for their Minimum Quench Energy (<italic>MQE</italic>). At 90&#x0025;<italic>Ic</italic> and 15 T, the average gain of <italic>MQE</italic> of the Nb3Sn wire soldered to the Cu&#x002F;Gd2O2S 55 &#x03BC;m thick ribbon was 2.5, and further increased at larger transport currents.

Minimum Quench Energy of Nb3Sn Wires With High Specific Heat Tape

Minimum Quench Energy of Nb₃Sn Wires With High Specific Heat Tape