Critical currents and AC losses on subsize cables of the NET-EM/LMI 40 kA Nb(3)Sn cable in conduit conductor prototype
Critical currents have been measured on subsize cables, up to the 27-strand level, of the 40-kA NET/EM-LMI Nb(3)Sn prototype conductor for the OH solenoid of NET. Energy losses in basic strands were determined by magnetisation cycles. Copper and stainless steel were used as conduit materials to produce CIC conductors with a 0.35 void fraction, lower than that of the full-size conductor. The experimental results have shown that, compared to the single-strand current, practically no degradation is observed in cables with a Cu conduit, while the cables with a stainless steel conduit have a critical current lowered by cooldown strain to 0.57 of the expected current in a 27-strand cable at zero intrinsic strain. The measurements of ac losses have indicated high hysteresis losses (effective diameter 70 micron). Coupling losses are expected to be negligible.
Bibliographic Reference: Report: RT/NUCL/90/19 EN (1990) 6 pp.
Availability: Available from Servizio Studi e Documentazione, ENEA, Centro Ricerche Energia Frascati, C.P. 65-00044 Frascati, Roma (IT)
Record Number: 199111417 / Last updated on: 1994-12-02
Original language: en
Available languages: en