본문 바로가기
HOME> 저널/프로시딩 > 저널/프로시딩 검색상세

저널/프로시딩 상세정보

권호별목차 / 소장처보기

H : 소장처정보

T : 목차정보

IEEE transactions on applied superconductivity : a... 147건

  1. [해외논문]   Mechanical Characterization and Modeling of a Powder-In-Tube MgB2 Strand   SCI SCIE

    Lenoir, Gilles , Aubin, Veronique
    IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee v.27 no.4 pt.3 ,pp. 1 - 5 , 2017 , 1051-8223 ,

    초록

    The strain dependence of superconducting material is known to be responsible for the degradation of the electrical performance of cables. As such, their electrical optimization requires an understanding of their mechanical behavior. This paper introduces a method for elasto-plastic modeling of commercial MgB 2 multifilamentary strands manufactured by the ex situ powder-in-tube method. The model is based on a simplified representation of the structure, built using components' volume fractions and nanoindentation test data. Monotonic and cyclic tension-compression tests were performed on the strands before and after chemical dissolution of the Monel outer layer to provide a multiscale experimental database. These tests were used to identify the parameters of the kinematic and isotropic hardening laws of the elasto-plastic model. The model intends to be subsequently used to simulate the electrical behavior of cables and define guidelines for the manufacturing process, cabling process, and end-product operating condition.

    원문보기

    원문보기
    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

    Fig. 1 이미지
  2. [해외논문]   Temperature and Field Dependence of the Quench Propagation Velocity in Industrial REBCO Coated Conductors   SCI SCIE

    Bonura, M. , Senatore, C.
    IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee v.27 no.4 pt.3 ,pp. 1 - 5 , 2017 , 1051-8223 ,

    초록

    A study of the quench propagation velocity in coated conductors produced by various manufacturers is presented. Based on an experimental investigation of the thermal and electrical properties of the coated conductors, the longitudinal normal zone propagation velocity has been calculated as a function of the temperature and magnetic field, and for different orientations of the field with respect to the tape surface. Contrary to what observed in low-temperature superconductors, we have found that the quench propagation velocity in REBa 2 Cu 3 O 7-x coated conductors is weakly affected by the magnetic field and temperature, and is mainly determined by the operating current. The longitudinal normal zone propagation velocity at a given operating current assumes comparable values in the examined coated conductors, regardless of the differences in the structural, thermal, and electrical properties. The normal zone propagation velocity in the direction perpendicular to the tape surface has also been studied, starting from experimental data of the longitudinal and transverse thermal conductivities of the coated conductors.

    원문보기

    원문보기
    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

    Fig. 1 이미지
  3. [해외논문]   Trapped Field Enhancement of a Thin, High-Jc MgB2 Bulk Without Flux Jumps Using Pulsed Field Magnetization With a Split-Type Coil With a Soft Iron Yoke   SCI SCIE

    Fujishiro, H. , Takahashi, K. , Ainslie, M. D. , Mochizuki, H. , Naito, T.
    IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee v.27 no.4 pt.3 ,pp. 1 - 4 , 2017 , 1051-8223 ,

    초록

    We have investigated the suppression of flux jumps and the enhancement of trapped field on a thin, high-J c MgB 2 bulk (30 mm in diameter and 7 mm in thickness) for the pulsed field magnetization (PFM) using a split-type coil with a soft iron yoke, and compared the results to those magnetized using the split-type coil without a yoke and a solenoid-type coil with a yoke. A maximum-trapped field, B z , of 0.71 T at 14 K was achieved on the bulk surface without flux jumps by using the split coil with yoke. On the other hand, low B z values with flux jumps were observed for the cases using the split-type coil without a soft iron yoke, and the solenoid-type coil with a yoke. These results reproduce previous ones for a thick, high-J c MgB 2 bulk (22 mm in diameter and 15 mm in thickness), for which the trapped field was enhanced to a record high value of B z = 1.10 T at 13 K by PFM using the split-type coil with a yoke.

    원문보기

    원문보기
    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

    Fig. 1 이미지
  4. [해외논문]   Relaxation of Microwave Nonlinearity in a Cuprate Superconducting Resonator   SCI SCIE

    Huizen, Richard A. , Hamilton, Sean L. , Lenters, Geoffrey T. , Remillard, Stephen K.
    IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee v.27 no.4 pt.3 ,pp. 1 - 5 , 2017 , 1051-8223 ,

    초록

    The second- and third-order nonlinear microwave response of a superconducting YBa 2 Cu 3 O 7 thin-film resonator was synchronously measured using three input tones. This technique permits the local measurement, and hence mapping, of intermodulation distortion inside the resonator. Second- and third-order IMD measured with a fixed probe relaxed in remarkably different ways after the removal of a static magnetic field. The second-order IMD relaxed by two different magnetic processes, a fast process that appears related to bulk remanent magnetization and a slow process that fits the description of Bean and Livingston. The third-order IMD relaxes by only one process that is distinct from the two processes controlling second order relaxation.

    원문보기

    원문보기
    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

    Fig. 1 이미지
  5. [해외논문]   Optimization of Deposition Conditions to Grow High-Quality Fe–Se–Te Thin Films   SCI SCIE

    Pusheng Yuan , Zhongtang Xu , Yanwei Ma , Yue Sun , Tamegai, Tsuyoshi
    IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee v.27 no.4 pt.3 ,pp. 1 - 5 , 2017 , 1051-8223 ,

    초록

    High-performance Fe-Se-Te (FST) films are favorable for revealing the relationships between the crystal structure and the superconducting properties of the material because of their simple structures. Therefore, it is particularly important to prepare high-quality “11” thin films. Herein, we focused on the thickness and deposition temperature dependence of T c zero and found that the thickness of about 200 nm and the deposition temperature of 300 °C are the optimal parameters for growing high-quality FST films on CaF 2 and SrTiO3 substrates, which exhibit T c zero of 18.8K and 17 K, respectively. Magnetic J c values of FST films grown on CaF 2 and SrTiO 3 are both larger than 2 × 10 6 A·cm -2 at 4.2 K and self-field, significantly higher than that of FST single crystals.

    원문보기

    원문보기
    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

    Fig. 1 이미지
  6. [해외논문]   Development and Characterization of P-doped Ba-122 Superconducting Tapes   SCI SCIE

    Contarino, D. , Lohnert, C. , Johrendt, D. , Genovese, A. , Bernini, C. , Malagoli, A. , Putti, M.
    IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee v.27 no.4 pt.3 ,pp. 1 - 4 , 2017 , 1051-8223 ,

    초록

    Among the recently discovered Fe-based superconducting compounds, the Ba-122 phase has proved to be the more attracting for the development of powder in tube (PIT) processed conductors. In fact, after some years of development, critical current densities (J c ) of about 10 5 A/cm 2 at 4.2 K and magnetic fields up to 10 T have been obtained in (Ba 0.6 K 0.4 )Fe 2 As 2 , PIT wires and tapes. To develop a safe upscaling method, the synthesis of the powders is a crucial point. In order to avoid the use of highly reactive K we have developed BaFe 2 (P 1-x As x ) 2 PIT tapes. This compound has proved to be very stable and in form of crystals and thin films exhibits excellent critical current: We succeeded in manufacturing PIT tapes with this phase with J c values of about 10 3 A/cm 2 at 4.2 K in self-field. Detailed microstructural and chemical investigations of the samples have been performed by high-resolution TEM, scanning TEM, and electron energy loss spectrometry analysis. A deformation network inside the grains that can induce strong pinning has been observed. However, chemical inhomogeneities at the grain boundaries are also present, which limit the transport current.

    원문보기

    원문보기
    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

    Fig. 1 이미지
  7. [해외논문]   Electromechanical Performance Study on Silver Diffusion Joints of REBCO Coated Conductors Under Axial Tensile Stress   SCI SCIE

    Xinyang Wu , Wei Wu , Jiamin Zhu , Tongxu Chang , Yue Zhao , Zhi-Wei Zhang , Yunhao Pan , Junliang Zuo , Zhuyong Li , Zhiyong Hong , Zhijian Jin
    IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee v.27 no.4 pt.3 ,pp. 1 - 6 , 2017 , 1051-8223 ,

    초록

    Silver diffusion method is a promising candidate for joining the second generation high temperature superconducting tapes that can achieve a joint resistance of nΩ level while retaining full critical current. In this study, silver diffusion joints with joint resistance as low as

    원문보기

    원문보기
    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

    Fig. 1 이미지
  8. [해외논문]   The Magnetic-Field Dependence of Critical Current: What We Really Need to Know   SCI SCIE

    Strickland, N. M. , Wimbush, S. C.
    IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee v.27 no.4 pt.3 ,pp. 1 - 5 , 2017 , 1051-8223 ,

    초록

    In high-temperature superconducting coated conductors, it is well known that engineered flux pinning defects and the deposition techniques themselves often lead to strong anisotropic variations in the critical current that are not necessarily aligned with the coordinate system of the wire. Nevertheless, it is common in the literature and in practice to characterize superconducting wires in terms of the field dependences of their critical current for magnetic fields applied perpendicular to the plane of the wire, with the implication that the critical current has a minimum value for this configuration. Here, we demonstrate the extent to which oversimplified interpretations of field dependencies can provide a misleading view of the actual wire performance. Samples that appear to be isotropic are shown in fact to be highly anisotropic, while minimum critical current values are seen to differ from those values obtained in the cardinal field directions. In lieu of a full angular characterization, we propose an alternative magnetic-field dependence: that of the angular minimum of the critical current. This metric can be a useful guide to efficient device design, and is also an informative way to evaluate critical current enhancements effected by compositional or processing variations.

    원문보기

    원문보기
    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

    Fig. 1 이미지
  9. [해외논문]   Development of Ag-Barrier RHQT Nb3Al Wires   SCI SCIE

    Banno, Nobuya , Takeuchi, Takao , Iijima, Yasuo , Nishijima, Gen , Kitaguchi, Hitoshi , Miyashita, Katsumi
    IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee v.27 no.4 pt.3 ,pp. 1 - 4 , 2017 , 1051-8223 ,

    초록

    A new type of rapid-heating, quenching and transformation-processed Nb 3 Al wire incorporating Ag-barrier structure have been developed to realize both the interfilament decoupling and the low wire breakage risk during the drawing. The barrier has a three-layered structure of Nb/Ag/Nb. Ag does not react with Nb at all even during the rapid-heating and quenching (RHQ) treatment and not penetrate into the Nb 3 Al filaments, which is necessary for maintaining the critical current density (J c ) characteristics. Drawability of the Ag-barrier Nb/Al precursor composite was excellent; a prototype 200 m wire with Ø1.35 mm was successfully drawn without any breakage. Ag intermediate layer allocated between the Nb layers suppresses flux jumps at low fields even at 1.8 K. It is notable that the Ag intermediate layer acts as a role of cushioning, when the wire is subject to applied strain, mitigating stress concentration inside the wire and leading to enhancement of the irreversible strain up to about 0.6%: this would be a key factor especially for the “React & Wind” magnet applications. Cu stabilizer can be easily attached through a “tube-method” after RHQ. The filament size can be reduced down to about 25 μm. The hysteresis loss (±3 T@4.2 K) per nonstabilizer volume was reduced down to 614 mJ/cm 3 .

    원문보기

    원문보기
    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

    Fig. 1 이미지
  10. [해외논문]   Measurements of Magnetic Field and Temperature Dependence of the Critical Current in Bi-2212 Superconducting Wires   SCI SCIE

    Leveratto, Alessandro (Ist. Superconduttori Mater. Innovativi e Dispositivi Consiglio Naz. delle Ric., Genoa, Italy) , Zunino, Vittoria , Pallecchi, Ilaria , Braccini, Valeria , Ferdeghini, Carlo , Malagoli, Andrea
    IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee v.27 no.4 pt.3 ,pp. 1 - 3 , 2017 , 1051-8223 ,

    초록

    In this paper, we describe our built in-house system for the measurement of the critical current density J c in superconductors. The setup is able to tolerate currents up to 800 A, and works in fields up to 7 T and temperatures from 4.2 to 40 K. The peculiarity of our system lies in its versatility: we can measure a high variety of superconducting samples up to 15 cm in length, testing their performance also at temperatures achievable by cryocoolers. Magnetic field and temperature dependencies of critical current density J c (H, T) are measured in Bi-2212 round wires. Bi-2212 wires are fabricated by applying the new GDG (grooverolling/drawing/groove-rolling) process consisting of the alternation of groove-rolling and drawing techniques, which densifies the filaments already during the working procedure prior to the heat treatment. A J c ≈ 4 × 10 5 A/cm 2 in self-field at 4.2 K is measured and a J c scaling based on the collective pinning theory is shown to hold above 2 T.

    원문보기

    원문보기
    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

    Fig. 1 이미지

논문관련 이미지