# IEEE Transactions on Applied Superconductivity

## Issue 3  Part 3 • June 2015

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

## Filter Results

Displaying Results 1 - 25 of 194
• ### Front Cover

Publication Year: 2015, Article Sequence Number: 0002101
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• ### IEEE Transactions on Applied Superconductivity publication information

Publication Year: 2015, Article Sequence Number: 0002201
| PDF (132 KB)

Publication Year: 2015, Article Sequence Number: 0002308
| PDF (175 KB)
• ### Influence of Al Composition Thickness on Critical Current Density in Transformation-Processed $hbox{Nb}_{3}hbox{Al}$ Superconductors

Publication Year: 2015, Article Sequence Number: 6000204
Cited by:  Papers (1)
| | PDF (675 KB) | HTML

The influence of the Al layer thickness on the critical current density Jc of transformation-processed Nb3Al superconductors was investigated. The Al layer thickness in the jerry-roll filaments of precursor wires was varied from 120 to 250 nm; the Nb layer thickness is proportional to the Al thickness, keeping the Nb-Al composition ratio to 3. The rapid heating and quenching ... View full abstract»

• ### Fabrication and Superconducting Properties of Rod‐In‐Tube Multifilamentary Nb3Al Wire With Rapid Heating and Quenching Heat‐Treatment

Publication Year: 2015, Article Sequence Number: 6000304
Cited by:  Papers (2)
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In this paper, we reported the recent progress in developing practical kilometer-length rod-in-tube (RIT) multifilamentary Nb3Al superconducting wires at WST, which included the preparation of Cu/Nb-Al precursor wires, design and manufacture of rapid heating and quenching (RHQ) equipment, and RHQ heat-treatment process of Nb3Al wires. Superconducting properties and microstruc... View full abstract»

• ### Residual Resistances Ratio in NbTi Strands Extracted From the ITER PF1/6 Conductor Sample After SULTAN Tests

Publication Year: 2015, Article Sequence Number: 6000403
Cited by:  Papers (3)
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The residual resistance ratio (RRR) is an important parameter affecting the stability of superconductors and the quench protection properties of magnets. During the manufacture and testing of cable-in-conduit-conductors, RRR may change noticeably. Recently the RRR changes of Nb3Sn strands for conductors of the ITER toroidal coils have been studied during the manufacturing process, heat ... View full abstract»

• ### Variation of the Critical Properties of Alloyed Nb-Sn Wires After Proton Irradiation at 65 MeV and 24 GeV

Publication Year: 2015, Article Sequence Number: 6000505
Cited by:  Papers (5)
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A recent proton irradiation study on Ta and Ti alloyed industrial multifilamentary Nb3Sn wires has now been extended to fluences up to 1.38 × 1021 p/m2, the Bragg peak region being located outside of the wire. In the present work, magnetization measurements were performed up to 14 K and 10 T, to follow and determine with more precision the development of the... View full abstract»

• ### Development of Nb-Rod-Method Cu–Nb Reinforced Nb3Sn Rutherford Cables for React-and-Wind Processed Wide-Bore High Magnetic Field Coils

Publication Year: 2015, Article Sequence Number: 6000605
Cited by:  Papers (8)
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We developed Cu-Nb reinforced Nb3Sn Rutherford cables for wide-bore high magnetic field coils that were able to be produced by React-and-Wind technique. The Cu-Nb/Nb3Sn strands were reinforced by internal Cu-20 vol%Nb composites fabricated by the Nb-rod-method and were manufactured through the bronze-process. The Rutherford cables composed of sixteen un-reacted Cu-Nb/Nb3... View full abstract»

• ### Results of Mass Production of Internal Tin Nb3Sn Strand for ITER Toroidal Field Coil in Korea

Publication Year: 2015, Article Sequence Number: 6000705
Cited by:  Papers (1)
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Kiswire Advanced Technology (KAT) has successfully supplied 93 tons of Nb3Sn strands produced by the internal tin process for the toroidal field coil to the ITER project, which has been procured by the Korean Domestic Agency for over five years since 2009. There are 19 restacked subelements in a strand. Each has 180 niobium filaments. There are also three different types of spacers that... View full abstract»

• ### Fabrication and Superconducting Properties of the Bronze-Processed $\mbox{Nb}_{3}\mbox{Sn}$ Multifilamentary Wire Using Cu–Sn–Zn Alloy Matrix

Publication Year: 2015, Article Sequence Number: 6000804
Cited by:  Papers (2)
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We developed several new Cu-Sn-Zn-(Ti) alloys, which are so-called “CSZ alloy,” for practical bronze-processed Nb3Sn wires. Several CSZ alloys were fabricated via the Mizuta method. The Zn was uniformly dissolved in the α phase of the Cu-Sn alloy, and the Zn-Ti compounds were not found in the CSZ alloy. Various 19 Nb-filament CSZ Nb3Sn precursor wires wer... View full abstract»

• ### Targets for R&D on Nb3Sn Conductor for High Energy Physics

Publication Year: 2015, Article Sequence Number: 6000906
Cited by:  Papers (15)
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High Energy Physics has been consistently pushing the performance of technical superconductors, for the benefit of high field magnet technology. So far the workhorse for particle accelerators has been Nb-Ti, but the practical performance limit has been attained with the LHC. Calls for higher beam luminosity (e.g., HL-LHC), and higher beam energy (e.g., FCC), demand a transition from Nb-Ti to Nb View full abstract»

• ### The Study of Nb3Sn Phase Formation Process in Multifilamentary Superconductors for High-Magnetic-Field Systems

Publication Year: 2015, Article Sequence Number: 6001004
Cited by:  Papers (2)
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Recent investigations of the connection between the microstructure and the properties of Nb3Sn superconductors produced by the bronze method, for the large ITER magnets, have enabled us to develop wire fabrication technologies and to manufacture large quantities of such material that met all the technical requirements. The next stage is to study the possibility of increasing the critica... View full abstract»

• ### Strain Dependence of Critical Current for Nb3Al Superconducting Wire Fabricated by Restacked RHQT Process

Publication Year: 2015, Article Sequence Number: 6001104
Cited by:  Papers (1)
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Stress/strain dependence of critical current (Ic) was investigated for a restacked rapid-heating, quenching and transformation (RHQT) processed Nb3Al superconducting wire consisting of six solid-solution strands. Each strand has 78 filaments with 17.8 μm in diameter. The wire diameter and copper/ non-copper ratio are 0.808 mm and 1.57, respectively. The mechanical prop... View full abstract»

• ### Nonuniform Distribution of Elements in RRP® Nb3Sn Wires Doped Using Nb–Ti Rods

Publication Year: 2015, Article Sequence Number: 6001205
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In the restacked rod process (RRP®) Nb3Sn wires studied, Ti doping is achieved by replacing some Nb filaments with the standard Nb-47 wt% Ti alloy. We observed that, after full heat treatment, the amount of Ti in Nb3Sn does not increase linearly with the nominal doping, suggesting segregation of Ti. We found that, locally, at the doping sites, the Ti content can be as ... View full abstract»

• ### Degradation of the Cu Residual Resistivity Ratio in Cr-Plated Composite Nb3Sn Wires

Publication Year: 2015, Article Sequence Number: 6001306
Cited by:  Papers (1)
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Some of the bronze-route Nb3Sn wires produced for the ITER toroidal field magnets have values of the Cu residual resistivity ratio (RRR) lower than the specification (RRR > 100) when reacted with the longest ITER heat treatment cycle (cycle A: high-temperature plateau 200 h at 650 °C). As the low RRR value was suspected to be due to the Cr plating, CERN has carried out extensive investig... View full abstract»

• ### Study of Low Loss Experimental Superconducting Nb-Ti Wires to be used in FAIR Magnets

Publication Year: 2015, Article Sequence Number: 6001405
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For the effective operation of the Facility for Antiproton and Ion Research (FAIR) magnet system, a new class of superconducting wires with high current carrying capacity and low energy losses is needed. Special requirements are formulated to the wires for this application. Diameter of Nb-Ti filaments has to be about 3 μm, critical current density Jc has to be above 4500 A/mm View full abstract»

• ### Quench Property of Twisted-Pair $\hbox{MgB}_{2}$ Superconducting Cables in Helium Gas

Publication Year: 2015, Article Sequence Number: 6200105
Cited by:  Papers (2)
| | PDF (956 KB) | HTML

CERN's twisted-pair superconducting cable is a novel design which offers filament transposition, low cable inductance and is particularly suited for tape conductors such as 2G YBCO coated conductors, Ag-sheathed Bi2223 tapes and Ni/Monel-sheathed MgB2 tapes. A typical design of such twistedpair cables consists of multiple superconducting tapes intercalated with thin copper tapes as addi... View full abstract»

• ### Effect of Ball Milling and Fatty Acid Addition on the Properties of $\hbox{MgB}_{2}$ Wires

Publication Year: 2015, Article Sequence Number: 6200204
Cited by:  Papers (1)
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Improved inductive critical current density Jc, at medium and high magnetic fields B, has been obtained in MgB2 wires made from ball-milled and carbon-doped precursors. The analyzed Fe-sheathed monofilamentary wires have been manufactured by the powder-in-tube and in-situ methods. Carbon doping has been achieved by the addition of fatty acids, in particular oleic acid (C... View full abstract»

• ### The Effect of the Treatment Time in Diluted Water on the Superconducting Properties of $\hbox{MgB}_{2}$

Publication Year: 2015, Article Sequence Number: 6200304
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MgB2 powders were treated for different amount of time in diluted water (water-ethanol mixture) with two different water-to-ethanol ratios of 12: 18 and 6:24 to investigate the effect of diluted water-treatment on the superconducting properties of MgB2. The diluted water-treatment did not affect the phase composition of the powder. The magnetic moment measurement of both untr... View full abstract»

• ### Effect of Nanostructural Inhomogeneities on the Superconducting Characteristics of $\hbox{MgB}_{2}$ With Enhanced Grain Connectivity

Publication Year: 2015, Article Sequence Number: 6200404
Cited by:  Papers (1)
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MgB2-based bulk materials synthesized under 30 MPa-2 GPa pressure demonstrated an enhanced connectivity AF ~50%-98%,as compared tomostother reports (below50%), and a shielding fraction of 75%-100%. The materials inhibit high critical current densities jc, but no strict correlation was found between AF and jc. On the other side, we found correl... View full abstract»

• ### The Influence of Wire Heat Treatment on PIT $\hbox{MgB}_{2}$ Conductors Manufactured Using Laboratory-Made Boron

Publication Year: 2015, Article Sequence Number: 6200504
Cited by:  Papers (1)
| | PDF (638 KB) | HTML

In this paper, we discuss the influence of heat treatment (applied to the wire as sintering for ex situ wire, or synthesis for in situ wire) on critical current density of MgB2-based wires. A comparison of this influence (changing the synthesis/sintering parameters, i.e., time and temperature, applied to wire samples) for different manufacturing techniques has been given. Boron synthesi... View full abstract»

• ### Development and Characterization of Cu–Nb–MgB2 and CuNi–Nb–MgB2 Wires With VB2 and Carbon Nanotube Additions

Publication Year: 2015, Article Sequence Number: 6200705
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The relatively high critical temperature and upper critical field and the low cost of the raw materials are the main reasons to consider MgB2 as a very promising material for superconducting applications. Improving the relatively low flux pinning in this material is important to optimize the critical current density of MgB2 superconducting wires, tape, and bulks. Adding secon... View full abstract»

• ### Low-Temperature Scaling of the Critical Current in 1 G HTS Wires

Publication Year: 2015, Article Sequence Number: 6400105
Cited by:  Papers (5)
| | PDF (1263 KB) | HTML

We present highly detailed temperature, magnetic field and field angle dependent measurements of the critical current of a state-of-the-art commercial first-generation Bi-2223 high temperature superconductor wire (Sumitomo new type H high current density DI-BSCCO). By scaling the applied field values at different angles using the Blatter electron mass anisotropy expression, we demonstrate that the... View full abstract»

• ### Influence of Internal Magnetic Field Distribution on Critical Currents in a Single and Assembled Bi-2223 Tapes

Publication Year: 2015, Article Sequence Number: 6400204
| | PDF (662 KB) | HTML

We have investigated the influence of self-field on the critical current density distribution in a Bi-2223 tape and its effect on the current capacity of an assembled conductor. Critical current of a tape is usually measured by four-probe transport method under self-field. On the other hand, the critical current of an assembled conductor cannot be simply summed because the tape experiences differe... View full abstract»

• ### The Axial Tensile Stress–Strain Characterization of Ag-Sheathed Bi2212 Round Wire

Publication Year: 2015, Article Sequence Number: 6400304
Cited by:  Papers (3)
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The stress distribution generated by the differences in the thermal expansion and the electromagnetic load is the driving factor for the transport properties of Bi2212 superconducting round wire (RW). The effort on studying the impact of strain on the transport properties is increasing, in terms of the axial and transverse stiffness of the RW. Consequently, the experimental stress-strain data are ... 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