# IEEE Transactions on Applied Superconductivity

## Filter Results

Displaying Results 1 - 25 of 91
• ### 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»

• ### Can Topological Transitions be Exploited to Engineer Intrinsically Quench-Resistant Wires?

Publication Year: 2018, Article Sequence Number: 0500305
| |PDF (391 KB)

In this paper, we investigate whether by synthesizing superconductors that are tuned to a topological, node-reconstruction transition point, we could create superconducting wires that are intrinsically resilient to quenches. Recent work shows that the exponent characterizing the temperature dependence of the specific heat of a nodal superconductor is lowered over a region of the phase diagram near... View full abstract»

• ### Restoration of the Josephson Current by Applying a Vertical Magnetic Field

Publication Year: 2018, Article Sequence Number: 1200105
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We studied the modulation characteristics of the Josephson current through the Nb/Al–AlOx /Nb tunnel junction by applying an external magnetic field parallel to the junction plane two-dimensionally. We can obtain much information about uniformity in a tunnel barrier through a two-dimensional scan of the external magnetic fields. Furthermore, we also... 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»

• ### Compact High-Pole HTS Triband Bandpass Filters Using a New Feeding Structure

Publication Year: 2018, Article Sequence Number: 1500305
| |PDF (1041 KB)

We have designed a compact high-pole high-temperature superconducting triband bandpass filter (TBPF) using a new feeding structure. It combines an eight-pole dual-band bandpass filter (DBPF) that uses stub-loaded meander line open-loop resonators with two types of waveguides and an eight-pole single-band bandpass filter (SBPF) that uses meander line open-loop resonators. The DBPF forms the first a... View full abstract»

• ### Miniaturized Multiband HTS Bandpass Filter Design Using a Single-Perturbed Multimode Resonator With Multitransmission Zeros

Publication Year: 2018, Article Sequence Number: 1500405
| |PDF (926 KB)

This paper presents a miniaturized quint-band high-temperature superconducting (HTS) bandpass filter (BPF) based on a single-perturbed multimode resonator (PMMR). By properly adjusting the lengths and the position of the perturbation line in a PMMR, the intrinsic resonance modes can be controlled, which is advantageous for multiband design. The source-load coupling, spurlines, and matching stubs o... 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»

• ### Modelled Spin Sensitivity of nanoSQUIDs in Different Configurations

Publication Year: 2018, Article Sequence Number: 1600705
| |PDF (447 KB)

Micro- and nano-sized superconducting quantum interference devices (SQUIDs) allow the measurements of extremely low magnetic moment. In the last decade, many efforts have been devoted to the study and the development of these quantum sensors at a nanometric scale (nanoSQUIDs). In this paper, a study of performance of these nanosensors in different configurations is presented. In particular, the ma... 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
| |PDF (517 KB) | HTML

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
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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»

• ### In-House Industrial Production of the Superconducting Conductor for the 43 T Hybrid Magnet of LNCMI-Grenoble

Publication Year: 2018, Article Sequence Number: 4300705
| |PDF (468 KB)

The hybrid magnet being built at LNCMI-Grenoble is based on the combination of resistive inserts, made up of Bitter and polyhelix coils, with a large bore superconducting outsert. It will produce, in the first step, an overall continuous magnetic field of 43 T in a 34 mm warm bore aperture. The superconducting coil will provide a nominal magnetic field of 8.5 T in a 1.1 m cold... View full abstract»

Publication Year: 2018, Article Sequence Number: 4401606
| |PDF (413 KB)

Superconducting magnets have been widely used in medical devices for several decades, primarily in thousands of MRI systems worldwide. More recently superconducting magnets have begun to have a small but growing impact on a newer field of medical devices, namely cyclotron accelerators for hadron therapy. This is a form of radiation treatment that uses ionized particle beams (instead of X-rays) to ... View full abstract»

• ### Experimental Verifications of REBCO Layer Winding Aimed at Persistent Current Operation

Publication Year: 2018, Article Sequence Number: 4602405
| |PDF (460 KB)

Recent development in the superconducting REBCO joints is an encouraging prospect for realizing an HTS magnet in persistent current mode operation. In our ongoing project, we are developing a cryocooled 1 T REBCO magnet system with joints to demonstrate the joint performance in an operating condition expected, for example, for an MRI. Preliminarily, the small test coils have been fabricated... 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