Development of scaling rules for Rutherford type superconducting cables

Abstract

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Rutherford cables with anisotropic transverse resistance

“…The twisting area of this machine is shown in Fig. 2, and a complete description can be found in [1]. In addition, the machine has provision for introducing a core into the cable at the point of closing the strands.…”

Development of Rutherford-Type Cables for High Field Accelerator Magnets at Fermilab

“…Optimization of the cable pitch angle provides more mechanically stable cable and possibly lower critical current degradation due to less severe deformation of the wire at the edges of the cable [10]. 100 m of right-handed and lefthanded cables with pitch angles between 9 and 19 degrees were fabricated.…”

Recent improvements in superconducting cable for accelerator dipole magnets

“…Equally important as the ability to make cables with precise dimensions is the ability to control Ie degradation and a discussion of some reasons for these improvements have been presented [5]. We now will present some additional results which are based on the development of the 30-strand Inner Layer and 36-strand Outer Layer SSC dipole cables.…”

“…We now will present some additional results which are based on the development of the 30-strand Inner Layer and 36-strand Outer Layer SSC dipole cables. The initial parameters for these cables were obtained by scaling from the parameters for the 23-strand Inner Layer and 3D-strand Outer Layer cables which had been developed earlier [5]. In particular, the narrow edge compaction factor PFI = T]d/2wI, where d= strand diameter and WI = narrow edge width, was maintained constant at a value of 0.95.…”

“…The new cabling machine incorporates many features which were found to be essential for producing cables with low critical current (Ie) degradation and good dimensional control with the 36-strand cabler [5]. These features include the following: (I) magnetic hysteresis brakes capable of maintaining strand tension to ± 200 gm; (2) variable planetary motion to remove residual twist from the cable; (3) mandrel designed to support the strands all the way to the Turkshead rolls; (4) temperature control for the Turkshead; (5) on-line measurements of the cable dimensions.…”