# IEEE Transactions on Applied Superconductivity

## Issue 99

Early Access articles are new content made available in advance of the final electronic or print versions and result from IEEE's Preprint or Rapid Post processes. Preprint articles are peer-reviewed but not fully edited. Rapid Post articles are peer-reviewed and edited but not paginated. Both these types of Early Access articles are fully citable from the moment they appear in IEEE Xplore.

## Filter Results

Displaying Results 1 - 25 of 256
• ### Conduction Cooled HTS Current Leads for the SIS100 Corrector Magnets

Publication Year: 2018, Page(s): 1
| |PDF (168 KB)

The superconducting synchrotron SIS100 for the FAIR accelerator project requires 137 superconducting corrector magnets: chromaticity sextupoles, steerers and multipole correc-tors. These corrector magnets are distributed along a circumfer-ence of 1083.60 m. The coils of the corrector magnets are individually powered and require all together 244 pairs of current leads with the rated current of 250 ... View full abstract»

• ### Engineering and Tunable Propagation of Wave Packets in Superconducting Quantum Networks

Publication Year: 2018, Page(s): 1
| |PDF (394 KB)

Using simplified models, we have demonstrated how a single-electron wave packet can be engineered to realize directional and controlled transfer of quantum information across superconducting networks. A scheme to design different (energetically allowed) outcomes by tuning a single characteristic parameter of the driven pulse is proposed. We have identified an optimal wave packet generated by a nor... View full abstract»

• ### Waveform Conditioning Problems of Nanocrystalline Alloys under One/Two-Dimensional High-Frequency Magnetization

Publication Year: 2018, Page(s): 1
| |PDF (603 KB)

The problem of waveform distortion in high-frequency magnetization of nanocrystalline alloys have been discussed and analyzed in this paper. By measuring the sample in a rotational single sheet tester(RSST), the distortion caused by the DC bias field is largely reduced. A robust control algorithm based on model-free control(MFC) is developed to keep the magnetic flux density sinusoidal when the ma... View full abstract»

• ### Analytical Polynomial Models of Nonlinear Magnetic Flux Linkage for Switched Reluctance Motor

Publication Year: 2018, Page(s): 1
| |PDF (1200 KB)

To model the nonlinear characteristic of the flux linkage for the switched reluctance motor, a modified flux linkage analytical model and a fast model are proposed. The models are based on an original polynomial model which fits the '-' curve at different phase currents by analyzing the error percentage curve of the original model in this paper. The coefficient of the polynomial is discussed for a... View full abstract»

• ### HTS YBCO Resonator Configuration with Coplanar Optimized Flux Concentrator Strongly Coupled to rf SQUID

Publication Year: 2018, Page(s): 1
| |PDF (669 KB)

We developed a novel magnetic coupling module, formed of a monolayer superconducting flux concentrator which is integrated with a coplanar resonator, strongly coupled to HTS rf-SQUID. Three types of resonators, including a long stripline resonator between input loop and pick-up loop of the flux concentrator, a complementary split ring resonator (CSRR), and a spiral shape inside the input loop are ... View full abstract»

• ### AC Losses of Roebel Cables with Striated 2G YBCO Strands

Publication Year: 2018, Page(s): 1
| |PDF (1411 KB)

We present experimental data on the ac losses in Roebel cables with striated 2G YBCO strands. Electromagnetic measurements by pick-up coils were carried out at different temperatures between 10K and 85K at frequencies between 2Hz and 20kHz in transverse ac fields up to 0.5T. The Roebel cable samples were assembled from laser cut 2G YBCO strands, which consist of striated filaments prepared with la... View full abstract»

• ### Combination of Flywheel Energy Storage System and Boosting Modular Multilevel Cascade Converter

Publication Year: 2018, Page(s): 1
| |PDF (3621 KB)

This paper deals with a pulsed power supply system combining flywheel energy storage system (FESS) and a modular multilevel cascade converter (MMCC) for power compensation in performing rapid excitation of highly inductive and pulsed heavy loads. The FESS system consists of an induction motor with a flywheel to store kinetic energy. Parallelly connected capacitors cause self-excitation phenomena i... View full abstract»

• ### Fatigue Behavior of Critical Current Degradation for YBCO Tapes at 77 K

Publication Year: 2018, Page(s): 1
| |PDF (482 KB)

In the application of high temperature superconducting (HTS) tapes, they are prone to subject fatigue loadings such as repeated thermal cycles, periodic electromagnetic force and so on, which will affect the performance of superconductors and lead to the degradation of superconducting magnets and power systems. To optimize the design of superconducting device, it is important to fully understand t... View full abstract»

• ### Low-Resistance Soldered Joints of Commercial 2G HTS Wire Prepared at Various Values of Applied Pressure

Publication Year: 2018, Page(s): 1
| |PDF (1095 KB)

In this study, we prepared soldered joints of 2G HTS wires from three different manufacturers: SuNAM, SuperPower and SuperOx. We used Pb39Sn61 solder and varied the pressure applied on the joint during soldering in the 3.9-10.5 MPa range. We found that for all samples joint resistivity decreased with increasing applied pressure. Practically important, very low joint resistivity values in the 10-15... View full abstract»

• ### A Method for Greatly Reduced Edge Effects and Crosstalk in CCT Magnets

Publication Year: 2018, Page(s): 1
| |PDF (554 KB)

Iron-free CCT magnet design offers many advantages, one being the excellent field quality and the absence of multipole components. However, edge effects are present, although they tend to integrate out over the length of the magnet. Many modern accelerator applications, however, require that these magnets are placed in an area of rapidly varying optics parameters, so magnets with greatly reduced e... View full abstract»

• ### FEA Model and Mechanical Analysis of the Nb$_{3}$Sn 15 T Dipole Demonstrator

Publication Year: 2018, Page(s): 1
| |PDF (675 KB)

Nb$_{3}$Sn magnets with a nominal operation field of 15-16 T are being considered for the LHC energy upgrade (HE-LHC) and a post-LHC Future Circular Collider (FCC). To demonstrate the feasibility of 15 T accelerator quality dipole magnets, the US Magnet Development Program (MDP) is developing a single-aperture 15 T Nb$_{3}$Sn dipole demon... View full abstract»

• ### On a Full 3D Thermal Structural and Hydraulic Finite Element Model of the JT-60SA Toroidal Field Coils

Publication Year: 2018, Page(s): 1
| |PDF (6185 KB)

The JT-60SA Toroidal Field Coils (TFC) are currently being manufactured in Europe, and their assembly is progressing at full speed in QST, Naka. As part of their final acceptance, the coils are tested at nominal current in a dedicated facility of CEA in Saclay. To help defining the cool down strategy for the testing of the TFCs, and also to anticipate their behavior during the cooling down of the ... View full abstract»

• ### Quality management in production of textured templates for 2G HTS wire

Publication Year: 2018, Page(s): 1
| |PDF (761 KB)

Two major in-line quality control tools implemented at SuperOx in the production of textured templates for 2G HTS wire are the digital processing of optical images of the electropolished sub-strate surface and RHEED analysis of the texture of the IBAD-MgO layer. In routine production, we use these tools for contin-uous screening and early rejection of defective material and thus reduce cost of the... View full abstract»

• ### Multi-Terminal DC Transmission Systems based on Superconducting Cables Feasibility Study, Modeling and Control

Publication Year: 2018, Page(s): 1
| |PDF (768 KB)

This paper deals with the appropriate modeling and control strategy of a multi-terminal dc transmission (MTDC) system that incorporates high-temperature superconducting (HTS) dc cables. The system is based on voltage source converters (VSCs) for the interconnection of stiff ac grids. An overview of the high voltage direct current (HVDC) power transfer technology along with the possibilities it ena... View full abstract»

• ### Stealth superconducting magnet technology for collider IR and injector requirements

Publication Year: 2018, Page(s): 1
| |PDF (871 KB)

The intersection regions and the beam injection channel of a high-energy collider require magnets that must act strongly upon one beam yet not at all on a closely neighboring beam. Designs are presented for three examples: a septum dipole that serves as a forward spectrometer centered on an ion beam after collision, which must clear an electron beam leaving the IP; a final-focus quadrupole that mu... View full abstract»

• ### Update on the Mechanical Design of a cos$theta$ 16 T bending dipole for the Future Circular Collider

Publication Year: 2018, Page(s): 1
| |PDF (655 KB)

In order to explore the beyond Standard Model physics, a post-LHC circular collider is needed, able to achieve a higher energy range. The FCC (Future Circular Collider) project was launched at CERN with this goal and it is currently investigating the feasibility of a very large hadron collider with 50 TeV proton beams in a 100 km circumference. The EuroCirCol project is part of the FCC study under... View full abstract»

• ### Magnetic Design for the Superferric Multipole Magnets of the Super-FRS

Publication Year: 2018, Page(s): 1
| |PDF (1040 KB)

The Super-FRS (Superconducting FRagment Separator) to be built at GSI/FAIR (Facility for Antiproton and Ion Research) in Darmstadt, Germany, is a two stage in-flight fragment separator comprising 24 superferric dipoles and 31 multiplets. In each multiplet, quadrupoles and sextupoles will be arranged together with octupoles and steering dipoles in a common cryostat. The design of all the magnets fo... View full abstract»

• ### Evaluation of actual delamination strength of REBCO coated conductors based on the Weibull analysis considering size effect

Publication Year: 2018, Page(s): 1
| |PDF (656 KB)

Fujikura has developed production techniques of REBa$_{2}$Cu$_{3}$O$_{y}$ (REBCO, RE = rare earth) coated conductors (CCs) and provided high-performance REBCO CCs with long-length and high homogeneity of the critical current. REBCO CCs have a low c-axis strength (delamination strength) which originates from t... View full abstract»

• ### A Design Methodology for the Optimization of Three-Phase SFCL of Saturated Cores Type

Publication Year: 2018, Page(s): 1
| |PDF (850 KB)

Superconducting fault current limiters (SFCL) have already demonstrated their viability in electric power grids. The growth in distributed generation sources and an increased interconnec-tion of networks tend to increase the complexity of electric pow-er grids, rising the number of failures, especially short-circuits. To disseminate these technologies, the development of straight-forward design to... View full abstract»

• ### Stress Analysis of Winding process, Cooling down, and Excitation in a 10.7 T REBCO HTS Magnet

Publication Year: 2018, Page(s): 1
| |PDF (618 KB)

A 25.7 T, 32 mm cold bore HTS/LTS superconducting magnet has been fabricated and tested at Institute of Electrical Engineering, Chinese Academy of Sciences (IEE, CAS). The REBCO HTS insert experienced large stress state while it was energized up to the target field, which is harmful for the protection of the HTS insert. In this paper, to understand the stress distributions in the HTS insert clearl... View full abstract»

• ### Surface Decoration as Prospective Artificial Pinning Strategy in Superconducting YBa$_{2}$Cu$_{3}$O$_{7-delta}$ films

Publication Year: 2018, Page(s): 1
| |PDF (717 KB)

This study investigates chemically decorated surfaces as tools for the improvement of transport properties in superconducting YBa$_{2}$Cu$_{3}$O$_{7-delta}$ films. This approach makes use of low-cost, easily-tunable chemical methods to obtain self-assembled oxide nanostructures on a substrate that will serve ... View full abstract»

• ### Impact Investigations and Characteristics by Strong Electromagnetic Field of Wireless Power Charging System for Electric Vehicle under Air and Water Exposure Indexes

Publication Year: 2018, Page(s): 1
| |PDF (556 KB)

Our research team has been developed wireless power charging (WPC) system for electric vehicle (EV) using superconducting and normal conducting resonance coils in order to improve the transfer efficiency and stability. In the practical approach, when the EV, which is installed outside, is wirelessly charged without moving. The antenna (Tx) coil is disclosed by rain or snow and so on. From this rea... View full abstract»

• ### Numerical investigations of REBCO conductor with high limitation electric field for HDVC FCL

Publication Year: 2018, Page(s): 1
| |PDF (837 KB)

Superconducting Fault Current Limiters (SFCL) are already in operation in alternative current medium voltage applications (MVAC) and their use in HVDC grids is very promising due to their capability of reducing high short circuit currents. In the European project FASTGRID, started in January 2017, a 50 kV DC SFCL demonstrator will be built and tested. This limiter is expected to be made with state... View full abstract»

• ### Improvement of Levitation Properties owing to High Magnetic Field in a Magnetic Levitation System with Magnetic Shielding Effect of HTS Bulk

Publication Year: 2018, Page(s): 1
| |PDF (939 KB)

We studied a magnetic levitation system incorporating a magnet, a high-temperature superconducting (HTS) bulk, and a ferromagnetic material. We changed a permanent magnet into an HTS magnet to improve the levitation properties of the system. Numerical analysis results showed that the maximum levitation force and maximum restoring force were 1550 and 338 g, respectively, which are 14 and 4.6 times ... View full abstract»

• ### Effectiveness of Superconducting Fault Current Limiting Transformers in Power Systems

Publication Year: 2018, Page(s): 1
| |PDF (1158 KB)

Superconducting devices have emerged in many applications during the last few decades. They offer many advantages including high efficiency, compact size, and superior performance. However, the main drawback of these devices is the high cost. An option to reduce the high cost and improve the cost-benefit ratio is to integrate two functions into one device. This paper presents the superconducting f... 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