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YBa2Cu3Ox (YBCO) second-generation (2G) HTS conductors have been produced in lengths over 300 m in pilot scale facilities established at SuperPower. High throughput pilot-scale manufacturing has been demonstrated with tape speeds at or above 30 m/h of 12 mm wide tape (corresponding to 90 m/h of 4 mm wide conductor) in all steps. A 322 m long conductor with a minimum critical current value of 219 A/cm...
Since the quantitative characterization of nonohmic behavior of the polymer would aid in understanding the conduction mechanism we made a series of measurements at different voltages (7). For a fiber (PPBT 28555-19-2) with an effective length of 200 µm, the axial current was quite linear up to 0.12 MV/m (the highest field available on this sample because of a design feature of the Keithley 642 electrometer...
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