# IEEE Transactions on Applied Superconductivity

## Filter Results

Displaying Results 1 - 21 of 21
• ### High Tc TMR-Superconducting Mixed Sensor: Fabrication and Performance

Publication Year: 2019, Article Sequence Number: 1800105
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Giant magneto-resistive (GMR)-superconducting mixed magnetic sensors are expected to be widely used because of their excellent sensitivity, stability, band characteristics, and low cost. If a tunnel magnetoresistance (TMR)-superconducting mixed magnetic sensor is prepared using a higher sensitivity and lower power TMR instead of GMR, the performance of the device will be further improved. We have ... View full abstract»

• ### A Novel Design Method of Independent Zonal Superconducting Shim Coil

Publication Year: 2019, Article Sequence Number: 4400108
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In this paper, a novel active shimming method is proposed to minimize the shim coil-magnet and the shim coil-shim coil magnetic couplings simultaneously. In standard superconducting shim coil designs, each shim coil is usually designed individually to correct specific field harmonic components of the inhomogeneous field without considering the magnetic couplings among the shim coils and the main m... View full abstract»

• ### A Fast Quench Protection System for High-Temperature Superconducting Magnets

Publication Year: 2019, Article Sequence Number: 4700108
Cited by:  Papers (1)
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For reaching very high magnetic fields in fully superconducting magnets, beyond 16 T for particle accelerators dipoles and beyond 23 T for solenoids, the use of high-temperature superconductors (HTS) is unavoidable. Due to the high minimum quench energy in HTS these coils are much more difficult to protect against quenches using conventional methods, such as quench heaters or coupling loss induced... View full abstract»

• ### An Overcurrent Controlled HTS Persistent Current Switch Without Any Additional Switching Triggers

Publication Year: 2019, Article Sequence Number: 4700209
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A superconducting magnet, which operates in a persistent current mode (PCM), is able to reduce heat loss on current leads, therefore, gradually become promising and important in many industrial usages. To realize the PCM, a persistent current switch (PCS) is an indispensable part, which also greatly influences final charging quality, and PCS has been designed extending to many kinds. In this paper... View full abstract»

• ### NbTi/Nb/Cu Multilayer Shield for the Superconducting Shield (SuShi) Septum

Publication Year: 2019, Article Sequence Number: 4900108
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A passive superconducting shield was proposed earlier to realize a high-field (3-4 T) septum magnet for the Future Circular Collider. This paper presents the experimental results of a potential shield material, an NbTi/Nb/Cu multilayer sheet. A cylindrical shield was constructed from two halves, each consisting of four layers with a total thickness of 3.2 mm, and inserted into the bore of a spare ... View full abstract»

• ### Polarity Effect on Standard Lightning Impulse Surface Flashover Under Extremely Nonuniform Electric Field in Liquid Nitrogen

Publication Year: 2019, Article Sequence Number: 5000107
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With the improving voltage grade for high-temperature superconducting (HTS) power devices, the surface flashover phenomenon in liquid nitrogen has become an important factor that makes the HTS devices break down. So, the study on surface flashover characteristics in liquid nitrogen has become more important. This paper studied the polarity effect of standard lightning impulse surface flashover und... View full abstract»

• ### High-Temperature Superconducting Capacitor and Its Application to a Superconducting Wireless Power Transfer System

Publication Year: 2019, Article Sequence Number: 5000207
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A capacitor made of high-temperature superconducting (HTS) electrode plates and a dielectric layer, or “HTS capacitor” for short, has the potential advantages of working with other HTS devices at 77 K and producing low conductive loss at high frequency. It may have a specific application to cryogenic systems at high frequency, such as superconducting wireless power transfer (SWPT) systems. Working... View full abstract»

• ### Comparison of the Energy Potential of Copper and Superconducting Linear Electric Generators

Publication Year: 2019, Article Sequence Number: 5200105
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Linear electric generators (LEGs) are attractive devices for new efficient and sustainable ways of developing power generating technologies. This research work contributes in determining the increase of energy potential of LEGs while using superconductor coils instead of stator and actuator made of heavy and high permeability materials, necessary when conventional conductive material such copper i... View full abstract»

• ### Capacitor-Less High-Strength Resonant Wireless Power Transfer Using Open Bifilar Spiral Coil

Publication Year: 2019, Article Sequence Number: 5500108
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A highly efficient wireless power transfer (WPT) system is required in many applications to replace the conventional wired system. The high temperature superconducting (HTS) wires are examined in a WPT system to increase the power-transfer efficiency (PTE) as compared with the conventional copper/Litz conductor. The HTS conductors are naturally can produce higher amount of magnetic field with high... View full abstract»

• ### Impact of the Complex Interface Between Bi2Sr2CaCu2OxFilaments and Ag Matrix on the Quench Behavior of Composite Round Wires

Publication Year: 2019, Article Sequence Number: 6400109
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Bi2Sr2CaCu2Ox/Ag/Ag alloy (Bi2212) multifilamentary composite round wire is one of the candidates for fabricating superconducting magnets to generate magnetic fields greater than 20 T. After heat treatment, the microstructures of Bi2212 filaments are complex; notably, the interface between filaments and Ag matrix is meandered and many bridge connections ... View full abstract»

• ### Optimization of High-Energy Ball-Milling Time for Fe1.1Se0.5Te0.5Polycrystalline Superconductors

Publication Year: 2019, Article Sequence Number: 7400106
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The Fe1.1Se0.5Te0.5polycrystalline superconductors were prepared by a high-energy ball-milling (HEBM) technique. Ball-milling times of 0, 2, 4, 6, and 8 h were adopted to optimize this technique. The influences of ball-milling time on the phase distributions of milled powders and sintered bulks, the morphology of ball-milled powders, and superconducting properties ... View full abstract»

• ### Comparison of Constitutive Laws for Modeling High-Temperature Superconductors

Publication Year: 2019, Article Sequence Number: 8000110
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This paper investigates the conditions of use and the equivalence of various constitutive laws used to model the electromagnetic behavior of high-temperature superconductors: two versions of the critical state model (CSM), the power law model, and a so-called percolation model. All these models can be used to represent the same superconducting material with some limit of accuracy. The CSM and the ... View full abstract»

• ### Resistive Domains in Thin Superconducting Film Structures

Publication Year: 2019, Article Sequence Number: 8000209
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Resistive domains in the thin superconducting films deposited on wide substrates are analyzed in the frame of a stepwise voltage-current characteristic of superconductors. The approach allows us to obtain analytical solutions of the two-dimensional heat-diffusion equation, to analyze the influence of the film shape on the domain properties, and to reveal the main distinctions in the properties of ... View full abstract»

• ### Flux Pinning Mechanisms and Competition Between$\delta l$and$\delta {T_c}$Pinning in Polycrystalline Nano-Alumina-Doped YBa2Cu3O7-y

Publication Year: 2019, Article Sequence Number: 8000406
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Flux-pinning mechanisms of Al2O3-doped YBa2Cu3O7-y(Y-123) have been investigated by electrical and magnetic measurements. Using the Ambegaokar and Halperin model applied to magnetoresistivityρ(T, H), we calculated the critical current density in the grain boundaries at zero temperat... View full abstract»

• ### New Background Field Estimation Methods for Improving Numerical Multiscale Model in AC Loss Calculation

Publication Year: 2019, Article Sequence Number: 8200112
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A numerical multiscale model is used to resolve the high computation complexity in the ac loss calculation of large-scale superconducting devices and proves advantageous with regard to time and memory requirements. In the multiscale model, the background field estimation method is of crucial importance to the calculation accuracy. In this paper, we propose four new background field estimation meth... View full abstract»

• ### Analysis of Magnetization Loss on a Twisted Superconducting Strip in a Constantly Ramped Magnetic Field

Publication Year: 2019, Article Sequence Number: 8200207
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Magnetization loss on a twisted superconducting (SC) tape in a ramped magnetic field is theoretically investigated through the use of a power law for the electric field-current density characteristics and a sheet current approximation. First, the Maxwell equation in a helicoidal coordinate system is derived to model a twisted SC tape, taking account of the response to the perpendicular field compo... View full abstract»

• ### Multiscale Method for AC Loss Calculation of HTS Coated Conductors With Magnetic Substrate

Publication Year: 2019, Article Sequence Number: 8200307
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The ac loss calculation problem is the key issue for a superconducting magnet. The existing numerical models do not consider the magnetic properties of the substrate while calculating the transport ac loss of high temperature superconductor (HTS) coated conductors. In fact, the unacceptable time and memory consumption makes the ac loss calculation a tough task while considering the magnetic proper... View full abstract»

• ### The Effect of Strain on the Transport Properties of Superconducting Strand and Cable in a Conduit Conductor

Publication Year: 2019, Article Sequence Number: 8400105
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A proper understanding of the degradation of the transport properties of cable-in-conduit conductors (CICCs) due to a changing strain distribution or to crack formation in the filaments is essential to determine the operational limits of the conductors and to optimize their design. Based on the electrical and strain properties of the superconducting strand, the performance of short samples of the ... View full abstract»

• ### Strain Responses of Superconducting Magnets Based on Embedded Polymer-FBG and Cryogenic Resistance Strain Gauge Measurements

Publication Year: 2019, Article Sequence Number: 8400207
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Large Lorentz forces commonly arise from the intense field and high current in superconducting coils, which can induce maximum stress up to several hundred megapascal (MPa) in magnets. It is a big challenge in compact high-field magnets with small mechanical margin during energization. In this paper, the mechanical characteristics and strain responses of two superconducting magnets with different ... View full abstract»

• ### An Investigation on the AC Dielectric Strength of Paper Sheet Insulation in Liquid Nitrogen

Publication Year: 2019, Article Sequence Number: 8800107
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In this paper, seven groups of sheet insulation for use in liquid nitrogen immersed power transformers have been tested under three different standard electrodes from ASTM D149-97a. The seven groups consist of three different types of paper/film, nonadhesive Kapton 100 HN (Kapton), THERNOMID 14.20 paper (NMN), and Nomex 410 paper (Nomex). The porous paper, Nomex 410, is found to have ac dielectric... View full abstract»

• ### Corrections to “Broadband Near-Infrared Superconducting Nanowire Single-Photon Detector With Efficiency Over 50%”

Publication Year: 2019, Article Sequence Number: 9700101
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We report a broadband superconducting nanowire single-photon detector for the near-infrared waveband. The optical absorptance in this band is enhanced by utilizing a reflective aluminum mirror and a SiO2 layer as an optical cavity. A broadband system detection efficiency (SDE) over 50% from 950 to 1600 nm with a low dark count rate of 10 Hz is realized by coupling a HI 1060 FLEX single-mode fiber.... 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