Improved high field performance of Nb‐Al powder metallurgy processed superconducting wires

1984 ◽  
Vol 44 (2) ◽  
pp. 260-262 ◽  
Author(s):  
C. L. H. Thieme ◽  
S. Pourrahimi ◽  
B. B. Schwartz ◽  
S. Foner
Keyword(s):  
Powder Metallurgy ◽  
High Field ◽  
Field Performance ◽  
Superconducting Wires ◽  
Al Powder

scholarly journals High-field performance of (Nb,Ta)3Sn superconducting wires fabricated by a new process

2003 ◽  
Vol 15 (1/2) ◽  
pp. 40-42
Author(s):  
Makoto AODAI ◽  
Hiroyuki IZAWA ◽  
Yuuya IKEDA ◽  
Ryo KAWASAKI ◽  
Takashi MORITA ◽  
...  
Keyword(s):  
High Field ◽  
Field Performance ◽  
Superconducting Wires ◽  
New Process

scholarly journals Structure and High-Field Performance of (Nb, Ta)3Sn Superconducting Wires Prepared form Sn-Ta Sheets

2004 ◽  
Vol 68 (9) ◽  
pp. 624-628 ◽  
Author(s):  
Kyoji Tachikawa ◽  
Yuuya Ikeda ◽  
Yasuyuki Koyata ◽  
Hiroyuki Izawa ◽  
Takao Takeuchi
Keyword(s):  
High Field ◽  
Field Performance ◽  
Superconducting Wires

High-Strength Nb3Sn Wire Development for Compact Superconducting Magnets

2007 ◽  
Vol 546-549 ◽  
pp. 1841-1848 ◽  
Author(s):  
K. Watanabe ◽  
Satoshi Awaji ◽  
Gen Nishijima
Keyword(s):  
High Field ◽  
Magnetic Energy ◽  
Superconducting Magnets ◽  
Small Diameter ◽  
High Strength ◽  
Superconducting Magnet ◽  
Hybrid Magnet ◽  
Superconducting Wires ◽  
External Reinforcement ◽  
Nb3sn Strand

A superconducting magnet with a magnetic energy of E = B2/2μo [J/m3] has to overcome a magnetic force of P = B2/2μo [Pa] in the same expression. This means that a high-field 20 T superconducting magnet produces an electromagnetic force of 160 MPa. In order to stand such a large force, Nb3Sn superconducting wires are usually reinforced by the hard-copper housing as an external reinforcement method or the stainless steel winding as a mechanical backup of an outermost Nb3Sn coil. If we focus on a compact superconducting magnet like a cryocooled superconducting magnet, a high-strength superconducting wire with a small diameter size of 1- 2 mm is required. The High-Field Laboratory for Superconducting Materials, IMR, Tohoku University has developed Nb3Sn wires internally reinforced with CuNb or CuNbTi composite. These high-strength Nb3Sn wires were successfully employed to construct the unique compact cryocooled 28 T hybrid magnet and the cryocooled 18 T high-temperature superconducting magnet. In addition, we found that the prebending effect for high-strength Nb3Sn wires outstandingly improves the Tc, Bc2 and Ic properties. As a next step, we intend to develop new Nb3Sn strand cables with the strong mechanical property of 500 MPa, applying the prebending effect for a future 22 T-φ400 mm room temperature bore superconducting magnet of a 50 T-class hybrid magnet.

Recent R&D on Superconducting Wires for High-Field Magnet

2014 ◽  
Vol 783-786 ◽  
pp. 2081-2090 ◽  
Author(s):  
Xin Zhe Jin ◽  
Tatsushi Nakamoto ◽  
Kiyosumi Tsuchiya ◽  
Akira Yamamoto ◽  
Toru Ogitsu ◽  
...  
Keyword(s):  
Critical Current ◽  
High Field ◽  
Materials Science ◽  
Rapid Heating ◽  
High Temperature Superconductors ◽  
Experimental Studies ◽  
High Energy ◽  
Superconducting Wires ◽  
Neutron Diffractometer ◽  
High Field Magnet

Development for superconducting wires of materials such as Nb3Al and the high-temperature superconductors (HTS such as REBCO, Bi2223, and Bi2212) has been carried out for high-field magnet applications. It is known that these types of wire exhibit very different characteristics and performance for different applications. The development of Nb3Al wire for high-field accelerator magnet has resulted in remarkable achievements in critical current using a Rapid Heating and Quenching (RHQ) method by High Energy Accelerator Research Organization (KEK) and National Institute for Materials Science (NIMS). As one example of a characteristic of Nb3Al, the strain sensitivity of the critical current in the RHQ-Nb3Al wire is better than that of Nb3Sn wire. A strain study is needed to further the development of a high-filed magnet; therefore, we have carried out experimental studies using the neutron diffractometer at J-PARC Takumi. Researchers have recently achieved the highest critical current density for REBCO wires in a high-field above 15 T. For this reason, REBCO wire has been considered for high-field magnet NMR applications in Riken. But several obstacles remain, including coil degradation, shielding current and thermal runaway. In this paper, R&D on recent advances for applications will be presented.

STRUCTURE AND HIGH-FIELD PERFORMANCE OF JELLY ROLL PROCESSED Nb[sub 3]Sn WIRES USING Sn-Ta AND Sn-Ti BASED ALLOY SHEET

2008 ◽  
Author(s):  
K. Tachikawa ◽  
T. Tsuyuki ◽  
Y. Hayashi ◽  
K. Nakata ◽  
T. Takeuchi ◽  
...  
Keyword(s):  
High Field ◽  
Field Performance ◽  
Alloy Sheet ◽  
Jelly Roll

Improved high-field performance in Nb/sub 3/Sn conductor prepared from intermediate compound

1997 ◽  
Vol 7 (2) ◽  
pp. 1355-1359 ◽  
Author(s):  
K. Tachikawa ◽  
Y. Kuroda ◽  
H. Tomori ◽  
M. Ueda
Keyword(s):  
High Field ◽  
Field Performance ◽  
Intermediate Compound
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