Conveners
Thu-Mo-Or30: Nb3Sn, BSCCO & MgB2 Conductors
- Wilfried Goldacker (Karlsruhe Institute of Technology / ITEP)
- Gen Nishijima (National Institute for Materials Science)
In recent years Nb3Sn strand made by the internal tin process has been proven as an industrial scale high field conductor, previously by the high volume production for ITER and presently for the CERN High Luminosity upgrade. Strand manufactured by a flexible internal tin Nb3Sn method may be readily customized for particular applications. The challenge for particle accelerator applications is...
Tube type Nb3Sn conductor has been being explored by Hyper Tech Research Inc. Our standard conductor with 217 filament arrays have been generated with 12 T non-Cu Jc values of about 2400-2500 A/mm2 with filament size of 40 micros at the 0.85 mm strand. We also made 547 filament conductor which has filament size of 25 micros at the 0.85 mm strand without any drawing issue. This conductor...
The current entrance and current transfer length (CTL) of prototype DEMO superconducting Nb3Sn internal-tin strands has been investigated in terms of strand diameter, magnetic field and current injection joint length. Knowledge of the current entrance effect of Nb3Sn strands provides insight on current distribution among strands in cables. In particular for large cable-in-conduit conductors...
Fermilab, as part of US MDP, is conducting Nb3Sn wire and cable R&D, with the goal of improving key properties and providing conductor specifications and data for design and construction of SC accelerator magnets for a future very high energy pp collider. SC wire R&D focused first on optimizing the regular Restacked-Rod Process Nb3Sn conductor by Bruker OST. Then, efforts were intensified on...
Sumitomo Electric has been developing silver-sheathed Bi2223 multi-filamentary wires, DI-BSCCO (Dynamically-Innovative BSCCO). The wires have been improved various properties in response to growing demands from application products and projects.
For high magnetic field applications targeting to more than several tesla, DI-BSCCO wires need to endure the intense hoop stress and maintain high...
A critical stage for any conductor technology, especially a wind and react (W&R) technology like Bi-2212 or Nb3Sn occurs when manufacturing becomes sufficiently mature for magnet use. This is now the case for Bi-2212, the only round wire, twisted, multifilamentary HTS conductor. Bi-2212 had fallen out of favor a decade ago because of its inferior Jc and complex heat treatment for W&R use. ...
Many superconducting devices require higher currents which leads to the request for cables assembling single wires or tapes. MgB2 cables were developed with different geometries: twisted and braided cables, Roebel and Rutherford style geometries. MgB2 cables allow to make winding with small diameters without current degradation and reduce the AC losses through the lowered coupling loss. The...
