Conveners
THU-OR5-601 A15-type Superconducting Wires and Cables
- Nobuya Banno (National Institute for Materials Science)
- TSUYOSHI YAGAI (Sophia University)
Internal oxidation technique could generate nano oxide particles in Nb3Sn strands, which could significantly refine the Nb3Sn grain size and boost the high-field critical current density. . In this paper, we will report the recent progress of the APC (Artificial Pinning Center) Nb3Sn wire in Hyper Tech. Our APC Nb3Sn wires with Ta and either Zr or Hf doping demonstrated substantial grain...
In order to improve the current performance of the Large Hadron Collider (HL-LHC project) or to construct the particle accelerators for the Future Circular Collider (FCC), the development of high field Nb3Sn magnets is of high importance. A Heat Treatment (HT) is required for the formation of the Nb3Sn superconducting phase that leads to various physic-chemical phenomena inside the...
Recently, we have reported successful fabrications of the Jelly-Rolled Nb/Al composite monofilament wires having 50 microns in outer diameter. Those Nb3Al super-fine wires show a ductile mechanical performance and may be promising to apply for the React and Wind high field superconducting magnets. However, those Cu/non-Cu ratio was 0.5. So far in our study, it has not been succeeded to draw...
Nb3Sn superconducting wires made by the restacked-rod process (RRP®) exhibit a precipitous change of their intrinsic irreversible strain limit εirr,0 with heat-treatment temperature , called the strain irreversibility cliff (SIC). The occurrence of SIC over a very narrow range of , within the domain of temperatures typically used for heat-treating magnets made of RRP® wires, can be a...
In the continuity of the Large Hadron Collider (LHC) large-scale projects are under development, such as the HiLumi - LHC and the Future Circular Collider (FCC), in order to produce particle collisions at higher luminosities and energies. The achievement of these projects strongly relies on the development of high field Nb3Sn magnets. The Nb3Sn intermetallic superconducting phase is produced...
The DEMO ENEA Low Field W&R (Wind and React) conductor, developed in the frame of the conceptual design studies for the Toroidal Field (TF) coils of DEMO, has been designed to be constituted of a small number of superconducting Nb3Sn strands and a high number of stabilization copper wires. It has been extensively characterized at the SULTAN facility in February 2021. The conductor has been...
AC loss in the Nb3Sn cable-in-conduit conductors (CICC) usually decreases after the conductor undergoes electromagnetic cycling. This can be attributed to the increase of inter-strand resistance due to strand-bonding detachment during cyclic loading. In the years 2018 to 2020, ITER launched a series of test campaigns in SULTAN test facility, whose aim was to study the Tcs degradation of TF...
