# IEEE Transactions on Applied Superconductivity

## Filter Results

Displaying Results 1 - 25 of 68
• ### Nitrogen Cryogenic System for the NICA Accelerator Complex at JINR

Publication Year: 2018, Article Sequence Number: 0500204
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The Nuclotron-based Ion Collider fAcility (NICA) accelerator complex is scheduled to be put into operation in full configuration in 2023 at JINR. This facility comprising the existing Nuclotron together with two newly created superconducting accelerators—booster and collider—will require additional refrigerating capacity at 4.5 and 77 K. The helium cryogenic system of the NICA comple... View full abstract»

• ### A Fast Wire-Routing Method and an Automatic Layout Tool for RSFQ Digital Circuits Considering Wire-Length Matching

Publication Year: 2018, Article Sequence Number: 1300105
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A fast wire-routing method considering wire-length matching of passive transmission lines (PTLs) is proposed. The method deals with channel routing between adjacent columns of active devices, and generates paths of PTLs with specified additional length packed in compact area based on simulated annealing. It uses a generation method of paths from a sequence of symbols for searching solutions effici... View full abstract»

• ### Logic Design of a 16-bit Bit-Slice Arithmetic Logic Unit for 32-/64-bit RSFQ Microprocessors

Publication Year: 2018, Article Sequence Number: 1300305
| |PDF (575 KB)

A 16-bit bit-slice arithmetic logic unit (ALU) is proposed for 32-/64-bit rapid single-flux-quantum microprocessors. It is based on a Ladner–Fischer adder. The ALU covers all of the ALU operations for MIPS32 instructions set. And each of the two 64-bit operands is divided into four slices of 16 bits each. The ALU uses synchronous concurrent-flow clocking and consists of 11 pipeline s... View full abstract»

• ### Independently Tunable HTS Dual-Band Bandpass Filters Using Dielectric Rods

Publication Year: 2018, Article Sequence Number: 1500105
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We have developed a high-temperature superconducting dual-band bandpass filter (DB-BPF) with independently tunable center frequencies. The DB-BPF is designed with stub-loaded hair-pin resonators. Dielectric rods are used to tune the center frequencies of both passbands. For the first passband, the dielectric rods are placed at the center of the resonators while keeping the second passband center f... View full abstract»

• ### Trimming Mechanism of External Quality Factor in HTS Bandpass Filter Using Bulk Resonators

Publication Year: 2018, Article Sequence Number: 1500205
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We investigated the usability of a trimming mechanism for varying an external quality factor ( $Q_{{rm{e}}}$) in a high-temperature superconducting bandpass filter (BPF) using bulk resonators at around 5 GHz. The proposed trimming mechanism was composed of air space between an input port and the first resonator in a Cu c... View full abstract»

• ### Investigation of Geomagnetic Orientation Preserved in a Stain Containing Iron Compounds Using a Vector-Type SQUID Magnetometer

Publication Year: 2018, Article Sequence Number: 1600104
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We investigate the orientation of the magnetic field preserved in a stain containing iron compounds, such as ink pigment or blood, using a superconducting quantum interference device (SQUID) magnetometer system. The magnetization of a cloth or paper sample is observed by applying a vector-type SQUID gradiometer, which detects three orthogonal components of the magnetic field, and mechanical modula... View full abstract»

• ### Unshielded SQUID Sensors for Ultra-Low-Field Magnetic Resonance Imaging

Publication Year: 2018, Article Sequence Number: 1600204
| |PDF (405 KB)

We have implemented a new field-tolerant low-critical-temperature superconducting quantum interference device current sensor with submicrometer Josephson junctions. The small junction area enables the fabrication of devices with lower sensor noise and higher tolerance against magnetic fields. An application benefitting from these properties is ultra-low-field magnetic resonance imaging (ULF MRI). ... View full abstract»

• ### Measurement of Magnetic Nanoparticles by Small HTS SQUID Array

Publication Year: 2018, Article Sequence Number: 1600304
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We propose a method to investigate the brain activity of a small animal by measuring blood flow with magnetic nanoparticles (MNPs) using a high-Tc Superconducting Quantum Interference Device (SQUID) array. For the preliminary study, we fabricated a three channel high-Tc SQUID array and demonstrated the detection of a small volume of water diluted MNPs in motion. Two detection methods were applied;... View full abstract»

• ### Production of HTS-SQUID Magnetometer With Ramp-Edge Junctions Exhibiting Lowered Noise in AC Biasing Mode

Publication Year: 2018, Article Sequence Number: 1600404
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We fabricated HTS-SQUID magnetometers with ramp-edge-type Josephson junctions and measured their noise properties using dc–ac biasing mode. Some exhibited lowered low-frequency noise by ac biasing, and others did not. We compared various parameters to find correlative ones with effectiveness of ac biasing. We found that the junction width and the critical current density of the counter elec... View full abstract»

• ### Flip-Chip High-Tc DC SQUID Magnetometer With a Ferromagnetic Flux Antenna

Publication Year: 2018, Article Sequence Number: 1600505
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We have combined a flip-chip high-Tc dc SQUID magnetometer with a ferromagnetic flux antenna made from 250 insulated 25-μm-thick stripes of amorphous soft magnetic Vitrovac 6025 foil inserted through the pick-up loop of the superconducting flux transformer. The ferromagnetic flux antenna provides improved magnetic coupling of the high-T View full abstract»

• ### Evaluation of the Magnetization Properties of Magnetic Nanoparticles in Serum Using HTS-SQUID

Publication Year: 2018, Article Sequence Number: 1600605
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The magnetization properties of magnetic nanoparticles (MNPs) changed by the action of the buffer and serum solutions with different viscosities were analyzed using dc and ac magnetometers that utilized high-temperature superconductivity–superconducting quantum interference devices. The magnetization properties of MNPs in different solutions with different viscosities were measured using a ... View full abstract»

• ### Electron-Beam Evaporated Superconducting Titanium Thin Films for Antenna-Coupled Transition Edge Sensors

Publication Year: 2018, Article Sequence Number: 2100204
| |PDF (499 KB)

Superconducting titanium thin films are good candidates for transition edge sensors. In this paper, we deposit titanium thin films on cooled silicon-on-insulator substrates by using electron-beam evaporation. The deposition rate dependence of the film stress, resistivity, and superconducting transition temperature are presented and analyzed. The relationship between film electrical properties and ... View full abstract»

• ### Toward Optimization of Centrifugal Barrel Polishing P rocedure for Treatment of Niobium Cavities

Publication Year: 2018, Article Sequence Number: 3500105
| |PDF (783 KB)

Centrifugal barrel polishing (CBP) is a simple and environmentally friendly method that can be applied for mechanical abrasion of the cavity interior in order to remove the mechanically damaged surface after its production. The CBP recipes described in the literature, however, require CBP to be performed in many stages, require long processing times and nevertheless are unable to provide good cavi... View full abstract»

• ### Superconducting RF at CERN: Operation, Projects, and R&D

Publication Year: 2018, Article Sequence Number: 3500205
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The CERN SRF infrastructure was originally set up for Nb on Cu-coated cavities for large electron positron collider (LEP) and later for large hadron collider (LHC). Today, Superconducting RF has become a vital technology not only for LHC but also for high intensity and energy upgrade of isotope separator on line device (HIE-ISOLDE) and the high luminosity (HL)-LHC project. More superconducting cav... View full abstract»

• ### Simulation of Force Generation Above Magnetic Tracks for Superconducting Levitation Systems

Publication Year: 2018, Article Sequence Number: 3600205
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Superconducting levitation systems mainly use permanent magnetic tracks to generate the magnetic field required for levitation. However, switchable tracks are necessary for crossings or turnouts. We present flux density simulations, which show the applicability of a concept combining permanent magnets with electromagnets to realize such a switchable track segment. Both tracks were simulated togeth... View full abstract»

• ### Design Optimization and Experimental Verification of an Electromagnetic Turnout for HTS Maglev Systems

Publication Year: 2018, Article Sequence Number: 3600405
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The turnout is a crucial track junction device of the ground rail transportation system, including high-temperature superconducting (HTS) Maglev systems. The permanent magnetic guideway (PMG) employed in the HTS maglev system has a strong magnetic force between the rail segments, which causes moving difficulties and increases operation costs when switching the PMG. In this paper, a type of nonmech... View full abstract»

• ### Manufacturing the European Superconducting TF Winding Packs for the ITER

Publication Year: 2018, Article Sequence Number: 4203705
| |PDF (489 KB) | HTML

The magnetic field, necessary for the plasma confinement in the International Thermonuclear Experimental Reactor (ITER), Cadarache, France, is provided by the 18 Toroidal Field Coils (TFC). In each coil, this magnetic field is produced by circulating a current of 68 kA through 4.5 km of Nb3Sn cable-in-conduit superconductor, which is assembled into a mechanical structure capable of with... View full abstract»

• ### Quench Protection of the Central Solenoid Model Coil for the CFETR

Publication Year: 2018, Article Sequence Number: 4700306
| |PDF (716 KB)

The China fusion engineering test reactor is a new tokamak device. The central solenoid (CS) model coil, which is responsible for developing and verifying the key manufacturing methods of a superconducting magnet, is now under engineering design. The rating current of the coil is 47.65 kA and total magnetically stored energy reaches 407 MJ, so a quench protection is required to discharge this huge... View full abstract»

• ### Impact of the Resistive Core on Losses in Superconducting Rutherford Cables: Analysis With the Continuum Model

Publication Year: 2018, Article Sequence Number: 4701105
| |PDF (572 KB)

Rutherford cables for particle accelerator magnets can be subjected to a time-varying magnetic field during the typical accelerator operating cycle, which in turn induces coupling currents flowing in the loops formed at the contacts between different strands. A proper analysis of the losses generated by these currents must be carried out for the design of the cryogenic system. A continuum model wi... View full abstract»

• ### Nb3Sn Wire Shape and Cross-Sectional Area Inhomogeneity in Rutherford Cables

Publication Year: 2018, Article Sequence Number: 4800705
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During Rutherford cable production, the wires are plastically deformed and their initially round shape is distorted. Using X-ray absorption tomography, we have determined the three-dimensional shape of an unreacted Nb3Sn 11-T dipole Rutherford cable and of a reacted and impregnated Nb3Sn cable double stack. State-of-the-art image processing was applied to correct for tomographic artifacts caused b... View full abstract»

• ### 3S–Superconducting DC-Busbar for High Current Applications

Publication Year: 2018, Article Sequence Number: 4800805
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Within a German government funded project a superconducting (HTS) high current DC-busbar is under development. The aim is the fabrication of a demonstrator with a length of 25 m and a nominal current of 20 kA for installation and test in an industrial real-life application. The concept is a modular system with rigid superconducting elements of arbitrary length, straight or with defined bend... View full abstract»

• ### Performance and Quench Characteristics of a Pancake Coil Wound With the 2G YBCO Roebel Cable

Publication Year: 2018, Article Sequence Number: 4801005
| |PDF (1771 KB)

The YBCO Roebel cable is a promising option for the high-energy accelerator magnets and tokamak devices with high-current carrying capability and compactness. Referring to the complex current sharing and normal zone propagation, it is difficult to apply the traditional superconductor quench measurement methodology to such a long Roebel cable (2 m) in an adiabatic condition. An alternative method f... View full abstract»

• ### Performance Analysis of the NbTi PF Coils for the EU DEMO Fusion Reactor

Publication Year: 2018, Article Sequence Number: 4901005
| |PDF (786 KB) | HTML

The first design of the NbTi poloidal field (PF) coils for the EU DEMO fusion reactor has been proposed by the Swiss Plasma Center and by the Italian National Agency for New Technologies, Energy and Sustainable Economic Development. The thermal-hydraulic (TH) performance analysis of the PF coil system presented in this work has been carried out using the state-of-the-art 4C code. The minimum tempe... View full abstract»

• ### Mechanical Analysis of the ENEA TF Coil Proposal for the EU DEMO Fusion Reactor

Publication Year: 2018, Article Sequence Number: 4901405
| |PDF (558 KB) | HTML

The design of the superconducting magnet system of the European DEMO fusion reactor is currently being pursued in the framework of the EUROfusion Magnets Work Package. Three alternative winding pack (WP) options for the toroidal field coils (TFCs) are being proposed by different research units, each featuring a different conductor manufacturing technology (react-and-wind versus wind-and-react) or ... View full abstract»

• ### System Approach of Usability of HTS Electrical Machines in Future Electric Aircraft

Publication Year: 2018, Article Sequence Number: 5201905
| |PDF (451 KB) | HTML

The concept of the more electric aircraft and fully electric aircraft implies the development of a fully new energy system. An ironless fully superconducting machine with outer ferromagnetic shield looks very promising due to high critical currents and low losses. This paper presents the results of the analytical calculation of the specific power for different power ranges and rotation speeds. Fin... 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