<![CDATA[ IEEE Transactions on Applied Superconductivity - new TOC ]]>
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TOC Alert for Publication# 77 2018April 26<![CDATA[Digital Superconducting Electronics Design Tools—Status and Roadmap]]>285112460<![CDATA[A Static Timing Analysis Tool for RSFQ and ERSFQ Superconducting Digital Circuit Applications]]>28515736<![CDATA[Synthesis Design of Wideband High-Selectivity HTS Filter by Cascading Dual-Mode Resonators]]>285172565<![CDATA[Dynamic Microwave Impedance of Dc-Biased Josephson Fluxonic Diode in the Presence of Magnetic Field and RF Drive]]>$R_{omega }$) up to an order of magnitude more than its zero magnetic field resistance ($R_{0}$). Under this circumstance, adding the bias current which can move generated vortex–antivortex pairs causes a substantial increase up to three orders of magnitude compared to $R_{0}$ either in forward or reverse-bias, while damping coefficient ${text{1}}/ surd beta _{c}$ ($beta _{c}$ is Stewart–McCumber parameter of Josephson junction) can limit this increase. It has also been shown that the variation of polarity, frequency, or amplitude of incoming microwave signal can impact on the impedance due to its relation with pair generation rate and so causes-
variations in observed impedance both in linear and nonlinear form. According to the results, low-microwave impedance of a JFD can be multiplied externally using biasing sets to match with high-impedance sources, which justifies its detection mechanism at microwave frequency.]]>28518851<![CDATA[Experimental and Numerical Study of a Magnetic Resonance Wireless Power Transfer System Using Superconductor and Ferromagnetic Metamaterials]]>285161390<![CDATA[A General Method to Simulate the Electromagnetic Characteristics of HTS Maglev Systems by Finite Element Software]]>285181260<![CDATA[The Measurement and Modeling of the Levitation Force Between Single-Grain YBCO Bulk Superconductors and Permanent Magnets]]>2851101173<![CDATA[Conceptual Design of the Power Supply System for the CFETR CS Model Coil]]>28515811<![CDATA[Fatigue Tests on ITER PF6 Coil Helium Inlet at 77K]]>-4 during 600 000 cycles at 77K or (1.9-19) × 10^{-4} during 30 000 cycles at 77 K, and the equivalent nominal tensile load range we calculated is about (33.5-335) kN. Two samples were designed and prepared to assess the structural design and weld quality. The fatigue test of the sample 1 was carried out with a load range of (33.5-335) kN at 4 Hz and 77 K, and it failed after 593 000 cycles. The scanning electron microscope images and finite element analysis showed that crack initiation area of the fractured sample 1 was at the bottom of the hole. The main reasons were that there were some stress concentrations inside the hole when the tensile load was provided, and the residual burrs assisted the crack initiation. Finally, the modified sample 2 with the completely removed burrs succeed after 600 000 cycles with a nominal load range of (33.5-335) kN. Therefore, it is concluded that the present optimized ITER PF6 helium inlet sample has good fatigue performance and meets the requirements of ITER, which can be utilized for practical applications.]]>285171133<![CDATA[Quench Detection Criteria for YBa2Cu3O7‐δ Coils Monitored via a Distributed Temperature Sensor for 77 K Cases]]>2 Cu_{3}O_{7‐}_{δ} (YBCO) HTS helix coil cooled by a liquid nitrogen (LN_{2}) bath and a YBCO HTS pancake coil cooled by conduction at 77 K. One is based on the minimum propagation zone (MPZ). The reference temperature to define the MPZ size is found for different operating currents. The other is based on the equilibrium temperature profile, in which the peak temperature and a characteristic normal zone length are found from a preselected reference temperature. The advantages and disadvantages of the two quench detection criterions are discussed and compared. Simulation results show that both criteria are independent of the nature of unpredictable heat disturbances. Similar to the helix coil, equilibrium temperature profiles independent of unpredictable disturbances are found for the pancake coil with different operating currents.]]>2851121286<![CDATA[The Use of a Small Single Fuel Cell to Feed a 10-H Superconducting Coil]]>28516624<![CDATA[Field Coil Optimization and Characteristics Contrastive Analysis for a High-Temperature Superconducting Generator Prototype]]>c-B-θ characteristics, and the minimum current to determine the operating current is also derived. After the optimization, the electromagnetic characteristics are improved and the operating current is increased.]]>285171535<![CDATA[A Finite-Element Method Framework for Modeling Rotating Machines With Superconducting Windings]]>H-formulation in the part containing the superconductors and the A -formulation in the part containing conventional conductors (and possibly permanent magnets). The main goal of this work is to determine and to correctly apply the continuity conditions on the boundary separating the two regions. Depending on the location of such boundary—in the fixed or rotating part of the machine—the conditions that one needs to apply are different. In addition, the application of those conditions requires the use of Lagrange multipliers satisfying the field transforms of the electromagnetic quantities in the two reference systems, the fixed and the rotating one. In this paper, several exemplary cases for the possible configurations are presented. In order to emphasize and capture the essential point of this modeling strategy, the discussed examples are rather simple. Nevertheless, they constitute a solid starting point for modeling more complex and realistic devices.]]>2851111092<![CDATA[Numerical and Experimental Analysis of an Inductive-Type Fault Current Limiter Using Short-Circuited 2G Tape]]> n-index, are strongly dependent on temperature. This is often neglected in transient simulations of devices employing HTS materials, due to unavailability of commercial software easily addressing electromagnetic and thermal interdependence. In this paper, the dynamical behavior of a single-phase inductive-type FCL using a single-turn short-circuited secondary built of HTS second-generation (2G) tape is analyzed by means of a methodology based on the electromagnetic–thermal behavior of the constitutive parts of the FCL. This methodology is fully implemented in MATLAB/Simulink. The transient response during normal and fault operations of line current, primary linked flux, temperature, and current in the 2G tape is simulated and compared with experimental results obtained from a developed prototype. The developed simulation tool provides results in few minutes.]]>285191662<![CDATA[Preparation of Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8+δ</sub>-YBa<sub>2</sub>Cu <sub>3</sub>O<sub>7−δ</sub> Bilayer Films by Acetate Based Photosensitive Sol-Gel Method]]>2Sr_{2}CaCu_{2}O_{8+δ} (Bi-2212)/YBa_{2}Cu_{3}O _{7−δ} (YBCO) and YBCO/Bi-2212 heteroepitaxial bilayer films have been successfully prepared on LaAlO_{3} (LAO) monocrystalline substrates by acetate based photosensitive Sol-Gel method. Two superconducting transition steps in the R–T curves of YBCO/Bi-2212 and Bi-2212/YBCO bilayer films were clearly observed. The first transition step has the superconducting critical transition temperature (Tc) of 90.1–90.8 K and the superconducting transition width (ΔTc) of 2–2.2 K, and these values correspond to the Tc and ΔTc values of YBCO single film. The second transition step has the Tc of 80–84 K and the ΔTc of 4.6–5.2 K, and these values correspond to the Tc and ΔTc values of Bi-2212 single film. XRD results showed that YBCO/Bi-2212 and Bi-2212/YBCO bilayer films grow heteroepitaxially with good in-plane and out-of-plane growth texture.]]>28516881<![CDATA[Numerical Study of the Thermal Stability of YBa2Cu3O7- δ Tapes Suffering Lightning Current]]>2Cu_{3}O_{7-δ} (YBCO) tapes suffering lightning current (LC). The electromagnetic and thermal equations have been implemented in finite-element method software in order to obtain a novel homogenization model. The validity of this model was verified by experiment. Based on the model, the distributions of the current and temperature in different layers were presented. The influence of the dimension and material type of different layers on the thermal stability was investigated in detail. The calculated results showed that increasing the width of a YBCO tape and the thicknesses of the encapsulation layer could decrease the maximum temperature. Moreover, the encapsulation layer made of copper is a more desired choice than that made of stainless steel to improve the thermal stability.]]>28517799<![CDATA[Force Analysis of Superconducting Coils in Actively Shielded Air-Core Superconducting Machines]]>285181430