# IEEE Transactions on Applied Superconductivity

## Volume 17 Issue 2  Part 3 • June 2007

This issue contains several parts.Go to:  Part 1  | Part 2

## Filter Results

Displaying Results 1 - 25 of 319

Publication Year: 2007, Page(s): C1
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• ### IEEE Transactions on Applied Superconductivity publication information

Publication Year: 2007, Page(s): C2
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Publication Year: 2007, Page(s):2517 - 2529
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Publication Year: 2007, Page(s): 2530
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• ### Maxwell's Equations in Superconductors

Publication Year: 2007, Page(s):2531 - 2536
Cited by:  Papers (3)
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A discussion is given of the various ways of defining fields in normal metals and superconductors. Josephson and Evetts used different approaches but they lead to the same results. The Evetts formulation, based on the chemical potential of a vortex line, leads to the development of thermo-electric equations using irreversible thermodynamics. The magnetic field terms in the Ginzburg-Landau free ene... View full abstract»

• ### ${\rm YBa}_{2}{\rm Cu}_{3}{\rm O}_{7}$ Coated Conductor Grown by Hybrid Liquid Phase Epitaxy

Publication Year: 2007, Page(s):2537 - 2541
Cited by:  Papers (2)  |  Patents (3)
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The hybrid liquid phase epitaxy (HLPE) approach has the potential to be a high rate-low cost process. This deposition process is used to grow epitaxial YBa2Cu3O7 (YBCO) films in the presence of a thin (100 to 500 nm) liquid BaO-CuO flux layer. Despite the presence of the molten flux, YBCO growth is found to be feasible on technical substrates because of the limited... View full abstract»

• ### Superconducting Properties of V-Ti Alloys

Publication Year: 2007, Page(s):2542 - 2545
Cited by:  Papers (4)
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The effects of alpha-Ti depositions, caused with the heat treatments at 300-500degC, were studied for various V-Ti alloys through measurements of Tc, Ic, and X-ray diffraction patterns. Jc increased with the alpha-Ti depositions for the V-Ti alloys with various Ti contents. The alpha-Ti depositions are very effective pinning centers in V-Ti alloys, being similar to... View full abstract»

• ### AC Losses and Critical Current Densities of NbTi/Cu Multifilamentary Tapes

Publication Year: 2007, Page(s):2546 - 2549
Cited by:  Papers (3)
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Several kinds of NbTi/Cu multifilamentary tapes with high aspect-ratio cross-sections were fabricated in order to develop new conductors used for windings of conduction-cooled LTS pulse- coils with both low ac losses and high stability. These tapes were obtained by the cold rolling process from normal multifilamentary wires. For the edge-on transverse magnetic field at 4.2 K, about 20% increases i... View full abstract»

• ### The History of Technical Superconductors Development in Russia

Publication Year: 2007, Page(s):2550 - 2555
Cited by:  Papers (1)
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The history of technical superconductivity in the USSR and later in the Russian Federation (RF) is very tightly connected with the name of Anatoly Nikulin one of the leading scientist of the Bochvar Institute. He made major contribution to the field of superconductivity in the RF as an applied scientist and as a leader of the National Program on the development of industrial production of the tech... View full abstract»

• ### Jc(T,B) and E(T) Dependencies for NbTi Strands Used in ITER PF Insert Coil

Publication Year: 2007, Page(s):2556 - 2559
Cited by:  Papers (1)
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In the framework of the characterization of NbTi strands manufactured by Bochvar Institute for the ITER insert coil the representative database of Jc(B,T) and E(T) was obtained. Measurements of Jc(B,T) were carried out on the samples taken from several batches of the strand at magnetic fields ranging from 5 to 9 T and temperature range from 4.2 to 7 K. All the strands were pr... View full abstract»

• ### Development of Internal Tin Nb3Sn Conductor for Fusion and Particle Accelerator Applications

Publication Year: 2007, Page(s):2560 - 2563
Cited by:  Papers (32)
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Performance improvements are needed for large-scale applications of Nb3Sn, such as ITER or LHC upgrades. The highest critical current density (Jc) values are achieved in distributed-barrier strand made by the Restacked Rod Process, which can reach 12 T, 4.2 K Jc values of 3000 A/mm2, with high residual resistivity ratio (RRR) values. For purposes of acce... View full abstract»

• ### Investigation on the Effect of Ta Additions on Jc and n of (Nb,Ti)3Sn Bronze Processed Multifilamentary Wires at High Magnetic Fields

Publication Year: 2007, Page(s):2564 - 2567
Cited by:  Papers (5)
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We have analyzed the influence of Ta on the superconducting properties of Ti doped bronze processed (Nb, Ta, Ti)3Sn multifilamentary wires. The study was carried out on wires with identical configuration, consisting of 14,641 filaments with 4.5 mum diameter embedded in a Ti bearing Osprey bronze and externally stabilized by copper. Several wires were made using either Nb7.5Ta or pure Nb... View full abstract»

• ### Development of High Performance Nb3Sn Conductor for Fusion and Accelerator Applications

Publication Year: 2007, Page(s):2568 - 2571
Cited by:  Papers (7)
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While the highest field performance is a primary goal of the conductor in the next generation of particle accelerators, emphasis has been focused mainly on the increase in current carrying capacity. The conductor needed for fusion application, however, requires much lower magnetization limit along with a critical current as high as possible. The upgraded strand specifications for the International... View full abstract»

• ### Spray-Formed High-Tin Bronze—A Homogeneous Pre-Material for Nb3Sn -Based Superconductor Wire

Publication Year: 2007, Page(s):2572 - 2575
Cited by:  Papers (1)  |  Patents (2)
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The advantages of high-tin bronze which is produced by the innovative process "spray forming" and its commercial application in Nb3Sn superconductor wire are presented. An important decision in the processing of Nb3Sn superconductor wire after the bronze method is the choice of pre-material. As the bronze, together with the niobium, is subjected to hot and cold forming proces... View full abstract»

• ### Virtual Impact Fractionation of Superconductor Precursor Powders in Inert Gas Atmosphere

Publication Year: 2007, Page(s):2576 - 2579
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Virtual impactor fractionation has been used to remove all particles over a selectable micron-sized threshold in samples of precursor powders for MgB2 and Nb3Sn superconductors. In a virtual impactor the powder is dispersed in an aerosol stream and passed through a vane geometry in which particles less than a critical size follow the gas streamlines which turn abruptly into a... View full abstract»

• ### New Fabrication Process for Nb3Sn Conductors Through Diffusion Reaction Between Nb and Ag-Sn Alloys

Publication Year: 2007, Page(s):2580 - 2583
Cited by:  Papers (1)
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We investigated the superconducting properties of Nb3Sn formed through the diffusion reaction between Nb and Ag-Sn alloys, including Ag-9at%Sn ductile fee phase and Ag-(12-16)at%Sn ductile zeta phase alloys, and Ag-24at%Sn brittle epsiv phase alloy. We fabricated single-core and multi-core composite wires by the rod-in tube and powder-in-tube processes. The composite wires were heat tre... View full abstract»

• ### Dispersion Strengthened Nb 3Sn Wire

Publication Year: 2007, Page(s):2584 - 2587
Cited by:  Papers (1)
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Dispersion strengthened Nb3Sn and regular Nb3Sn composites were fabricated. Their mechanical and superconducting properties were measured and compared. An increase in strength up to 10% and Jc (18 T, 4.2 K) up to 28% was achieved. The nanoparticle strengthened Cu, as a replacement of Cu, could be co-deformed with Nb to make Nb3Sn wire without changing th... View full abstract»

• ### Development of Strain-Applying Apparatus for Evaluation of ITER Nb3Sn Strand

Publication Year: 2007, Page(s):2588 - 2590
Cited by:  Papers (13)
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Japan Atomic Energy Agency has successfully developed Nb3Sn strand which fulfills ITER requirements. Because Nb3Sn is very susceptible to external strain which reduces critical current, critical temperature, and critical field, it is necessary to evaluate strain dependency of these Nb3Sn strands to confirm an ITER conductor design. An apparatus to measure the strai... View full abstract»

• ### Pure Bending Strain Experiments on Jacketed Nb3Sn Strands for ITER

Publication Year: 2007, Page(s):2591 - 2594
Cited by:  Papers (13)
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The effect of transverse loads on strands has been pointed as a possible cause of the difference observed when scaling transport properties of single strands to those of cable-in-conduit conductors. Single multifilamentary strands inside cables are in fact subject to bending strain due to the electromagnetic forces at operating conditions and to the geometrical layout. Here the influence of pure b... View full abstract»

• ### Application of Prebending Effect to Triplet Cables Using Bronze-Route Nb3Sn Strands

Publication Year: 2007, Page(s):2595 - 2598
Cited by:  Papers (5)
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An application of the prebending effect to a cabling process using Nb3Sn strands was demonstrated. The prebending effect is the enhancement effect of superconducting properties due to the repeated prebending treatment for practical bronze-route Nb3Sn wires. CuNb/Nb3Sn and Cu/Nb3Sn strands were applied prebending treatment using 10 fixed pulleys with 0.8% prebending... View full abstract»

• ### Scaling of the E(J) Characteristics in the ITER Type Nb3Sn Strands in Relation to the Applied Strain and Magnetic Field

Publication Year: 2007, Page(s):2599 - 2602
Cited by:  Papers (2)
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Voltage- current characteristics VCC(epsiv, B, 4.2 K) have been measured in the range of the applied axial tensile strain (epsiv) from 0% to 0.93% at magnetic fields 10 T and 12 T for ITER type bronze processed Nb3Sn strand and for similar strand with enhanced mechanical strength in which part of stabilizing copper was replaced by high strength high conductivity microcomposite Cu-Nb mat... View full abstract»

• ### Current Ripple Effect on n-Value

Publication Year: 2007, Page(s):2603 - 2606
Cited by:  Papers (2)
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We systematically studied the effect of current ripple on the determination of n-value, which is the index of the shape of the electric field-current (E-I) curve. Commercial Nb3 S n wires were measured with controlled amounts of ac ripple. Substitution- box, superconductor simulator circuits were also measured. A battery-powered current supply was used to provide the dc with ripple curr... View full abstract»

• ### RRP Nb3 Sn Strand Studies for LARP

Publication Year: 2007, Page(s):2607 - 2610
Cited by:  Papers (15)
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The NbSn strand chosen for the next step in the magnet R&D of the U.S. LHC Accelerator Research Program is the 54/61 sub-element Restacked Rod Process by Oxford Instruments, Superconducting Technology. To ensure that the 0.7 mm RRP strands to be used in the upcoming LARP magnets are suitable, extensive studies were performed. Measurements included the critical current, Ic, using the... View full abstract»

• ### Specific Heat, A Method to Determine the Tc Distribution in Industrial Nb3Sn Wires Prepared by Various Techniques

Publication Year: 2007, Page(s):2611 - 2614
Cited by:  Papers (17)
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A new calorimeter has been built with the special purpose to determine the distribution of Tc in industrial superconducting wires. Specific heat measurements have been carried out on a series of multifilamentary Nb3Sn wires, using a long relaxation technique. The advantage of this technique consists in the fact that the measurement is performed in presence of the Cu-Sn matrix... View full abstract»

• ### Grain Growth, Morphology, and Composition Profiles in Industrial Nb3Sn Wires

Publication Year: 2007, Page(s):2615 - 2618
Cited by:  Papers (8)
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The A15 formation process in Nb3Sn wires has been revisited. The progress of the reaction was studied by a careful FE-SEM study after a series of heat treatments at various temperatures and times. It was found that in the very early stage of the reaction, the Sn flow is high and a very thin layer of equiaxed A15 grains is formed at the interface between Nb and the Cu-Sn bronze. Beyond t... View full abstract»

## Aims & Scope

IEEE Transactions on Applied Superconductivity contains articles on the applications of superconductivity and other relevant technology.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Britton L. T. Plourde
Syracuse University
bplourde@syr.edu
http://asfaculty.syr.edu/pages/phy/plourde-britton.html