Conveners
M1PoC - NbTi/Nb3Sn/A15 Processing & Properties I
- Xingchen Xu (FNAL)
- Xuan Peng (Hyper Tech Research Inc.)
A standard tube-type Nb3Sn conductor was used for the winding of a sub-size MRI-like coil segment. The conductor was 0.8 mm OD and had 217 filaments, with a 45% non-Cu fraction. The wire was twisted, reacted, and then insulated with s-glass. After insulation, the coil was wound on a 1 m OD copper former. The total length of the conductor used was 1.6 km. The coil was instrumented for low...
An important step in the development of fusion as a future power source is the development of plasma facing materials that can function over long periods of time. While ITER and other devices like Wendelstein 7-X and the Joint European Torus will provide insights into divertor and first wall performance, a dedicated device to advance the understanding of material performance in representative...
Nb used in Nb3Sn multifilamentary superconductor wire deforms throughout the fabrication process including the initial extrusion and subsequent drawing, restacking, re-extrusion, and final drawing steps. Unfortunately niobium, usually begins as a 300 mm diameter ingot with extremely large grains. While this ingot gets reduced to a 120-150 mm diameter bar before wire fabrication, the cast...
This paper studies preparation process and its technology of high RRR value of Wire in channel (WIC) NbTi superconductor wires. It is generally accepted that the lower the oxygen content in the oxygen-free copper, the higher RRR value. In this paper, the results show that the RRR of WIC wire also can achieve relatively high levels under the high oxygen content condition.
Three methods were...
Knowledge of thermal-mechanical properties of epoxy-impregnated superconductor/insulation composite is important for designing and fabricating high field superconducting magnets towards their ultimate potentials. As a part of the 15 T dipole magnet program at Fermi National Accelerator Laboratory, we report the study of the mechanical properties and thermal contraction of epoxy-impregnated...
