Heat Treatment Optimization Studies on PIT Strand for the NED Project

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/mm 2 at 12 T applied field and 4.2 K and a filament diameter around 50 mum. Extensive heat trea...

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Published in:IEEE transactions on applied superconductivity 2009-06, Vol.19 (3), p.2564-2567
Main Authors: Boutboul, T., Oberli, L., den Ouden, A., Pedrini, D., Seeber, B., Volpini, G.
Format: Article
Language:English
Subjects:
Critical current
Critical current density
Heat treatment
Low-temperature superconductors
Magnetic field measurement
Niobium compounds
Superconducting filaments and wires
Superconducting magnets
superconducting materials measurements
superconducting wires
Superconductivity
Temperature
Tin
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cited_by cdi_FETCH-LOGICAL-c2467-a3855cbb77abe661b977a303e8ce1542d91b3367f0e0f5ce1dc97c14d46b3a703
cites cdi_FETCH-LOGICAL-c2467-a3855cbb77abe661b977a303e8ce1542d91b3367f0e0f5ce1dc97c14d46b3a703
container_end_page 2567
container_issue 3
container_start_page 2564
container_title IEEE transactions on applied superconductivity
container_volume 19
creator Boutboul, T.
Oberli, L.
den Ouden, A.
Pedrini, D.
Seeber, B.
Volpini, G.
description 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/mm 2 at 12 T applied field and 4.2 K and a filament diameter around 50 mum. Extensive heat treatment optimization studies were performed in order to maximize both critical current and RRR, with a plateau temperature down to 625degC 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 625degC with non-copper critical current density respectively exceeding 2700 and 1500 A/mm 2 at 12 and 15 T (4.2 K). Thanks to this modified heat treatment, this strand completely fulfills the NED stringent specification.
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subjects Critical current
Critical current density
Heat treatment
Low-temperature superconductors
Magnetic field measurement
Niobium compounds
Superconducting filaments and wires
Superconducting magnets
superconducting materials measurements
superconducting wires
Superconductivity
Temperature
Tin
title Heat Treatment Optimization Studies on PIT Strand for the NED Project
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