| Article | |
| Report number | CERN-AT-2008-041 |
| Title | Heat Treatment Optimization Studies on PIT Nb$_3$Sn Strand for the NED Project |
| Author(s) | Boutboul, T (CERN) ; Oberli, L (CERN) ; den Ouden, A (Twente U. Tech., Enschede) ; Pedrini, D (INFN, Milan Bicocca) ; Seeber, B (Geneva U.) ; Volpini, G (INFN, Milan ; LASA, Segrate) |
| Publication | 2009 |
| Imprint | 01 Mar 2009 |
| Number of pages | 6 |
| In: | IEEE Trans. Appl. Supercond. 19 (2009) 2564-2567 |
| In: | Applied Superconductivity Conference 2008, Chicago, IL, USA, 17 - 22 Aug 2008, pp.2564-2567 |
| DOI | 10.1109/TASC.2009.2019017 |
| Subject category | Accelerators and Storage Rings |
| Abstract | For the Next European Dipole (NED) program, a Powder-In-Tube (PIT) strand was successfully developed by SMI. This high-performance Nb$_{3}$Sn strand presents a non-copper critical current density of 2500 A/mm2 at 12 T applied field and 4.2 K and a filament diameter around 50 µm. Extensive heat treatment optimization studies were performed in order to maximize both critical current and RRR, with a plateau temperature down to 625 oC and duration up to 400 hours. It appears that a critical current enhancement of 10 % can be achieved for a reaction schedule of 320 hours at 625 oC with non-copper critical current density respectively exceeding 2700 and 1500 A/mm2 at 12 and 15 T (4.2 K). Thanks to this modified heat treatment, this strand completely fulfils the NED stringent specification. |
| Copyright/License | © 2009-2025 IEEE |
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Záznam vytvorený 2009-07-24, zmenený 2021-12-13
