Title: Experience of testing large quantity of Nb3Sn superconducting wires for ITER
Abstract: The materials group at MS&T has been characterizing superconductor properties for the international thermal-nuclear experiment reactor (ITER) since 2008. In the period of 2011-2013, large quantities of Nb3Sn wire samples have been measured as a part of ITER world-wide Nb3Sn verification program. Now the Nb3Sn verification testing project is completed. Looking back, there is much knowledge gained, and many valuable lessons learned.
In this presentation, after a brief introduction to ITER machine and its needs for superconducting wires, I will describe our Nb3Sn testing methods and facilities, which include critical current, residual resistivity ratio, and hysteresis loss measurements. I will also touch on project and quality management aspect of the project. I will then show the results of cross-checking measurements of 140 samples with university of Twente. Effects of heat treatment temperature/time and environment cleanness, and a few other topics of interest will be discussed.
Title: This project is financially supported by U.S. Department of Energy vie US-ITER under subcontract 4000110684, by the National Science Foundation under Grant DMR-0084173, and by the State of Florida.