Progress in Superconductivity and Cryogenics最新文献_第6页

Brief review of the field test and application of a superconducting fault current limiter 超导故障限流器的现场试验与应用综述

IF 0.3

Progress in Superconductivity and Cryogenics Pub Date : 2017-01-01 DOI: 10.9714/PSAC.2017.19.4.001

O. Hyun

引用次数: 8

Effects of the size of Mg powder on the formation of MgB2and the superconducting properties Mg粉末尺寸对mgb2形成及超导性能的影响

IF 0.3

Progress in Superconductivity and Cryogenics Pub Date : 2016-12-31 DOI: 10.9714/PSAC.2016.18.4.009

D. N. Kim, B. Jun, Soon‐Dong Park, Chan-Joong Kim, H. Park

{"title":"Effects of the size of Mg powder on the formation of MgB2and the superconducting properties","authors":"D. N. Kim, B. Jun, Soon‐Dong Park, Chan-Joong Kim, H. Park","doi":"10.9714/PSAC.2016.18.4.009","DOIUrl":"https://doi.org/10.9714/PSAC.2016.18.4.009","url":null,"abstract":"The effect of the size and shape of magnesium(Mg) powder on the formation of MgB 2 and the critical current density( J c, ) of MgB 2 bulk was studied. As a precursor for the formation of MgB 2 , Mg and MgB 4 powder, which was synthesized through the reaction of boron (B) with Mg powders, was used. MgB 4 was mixed with Mg powders of various sizes, pressed into pellets and heat-treated at 650 ℃ -750 ℃ in flowing argon gas. The XRD analysis of the heat-treated MgB 2 samples showed that the volume fraction of MgB 2 was the highest as 92.74 % when spherical Mg powder with an average size of 25.7 µm was used, whereas the volume fraction was the lowest as 79.64 % when plate-like Mg powder with a size of 34.1 µm was used. The superconducting transition temperature ( T c ) of MgB 2 was not sensitive to the characteristics of the Mg powders used. All of the prepared MgB 2 samples showed a high T c of 38.3 K and a small superconducting transition width of 0.2 K-0.5 K. J c (5 K and 1 T) of MgB 2 was the highest as 3.93×10 4 A/cm 2 when spherical Mg powder with a size of 25.7 µm was used, whereas J c was the lowest as 2.18×10 4 A/cm 2 when plate-like Mg powder with a size of 34.1 µm was used. The relationship between the J c of MgB 2 and the characteristics of the Mg powders used was explained in terms of the volume fraction of MgB 2 and the apparent density of the MgB 2 pellets.","PeriodicalId":20758,"journal":{"name":"Progress in Superconductivity and Cryogenics","volume":"18 1","pages":"9-14"},"PeriodicalIF":0.3,"publicationDate":"2016-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71376365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Effects of differently hardened brass foil laminate on the electromechanical property of externally laminated CC tapes 不同硬化铜箔层对外压CC带机电性能的影响

IF 0.3

Progress in Superconductivity and Cryogenics Pub Date : 2016-12-31 DOI: 10.9714/PSAC.2016.18.4.021

Z. Bautista, H. Shin, B. Mean, Jae-Hun Lee

{"title":"Effects of differently hardened brass foil laminate on the electromechanical property of externally laminated CC tapes","authors":"Z. Bautista, H. Shin, B. Mean, Jae-Hun Lee","doi":"10.9714/PSAC.2016.18.4.021","DOIUrl":"https://doi.org/10.9714/PSAC.2016.18.4.021","url":null,"abstract":"The mechanical properties of REBCO coated conductor (CC) wires under uniaxial tension are largely determined by the thick component layers in the architecture, namely, the substrate and the stabilizer or even the reinforcement layer. Depending on device applications of the CC tapes, it is necessary to reinforce thin metallic foils externally to one-side or both sides of the CC tapes. Due to the external reinforcement of brass foils, it was found that this could increase the reversible strain limit from the Cu-stabilized CC tapes. In this study, the effects of differently hardened brass foil laminate on the electromechanical property of CC tapes were investigated under uniaxial tension loading. The tensile strain dependence of the critical current ( I c ) was measured at 77 K and self-field. Depending on whether the I c of CC tapes were measured during loading or after unloading, a reversible strain (or stress) limit could be determined, respectively. The both-sides of the Cu-stabilized CC tapes were laminated with brass foils with different hardness, namely 1/4H, 1H and EH. From the obtained results, it showed that the yield strength of the brass laminated CC tapes with EH brass foil laminate was comparable to the one of the Cu-stabilized CC tape due to its large yield strength even though its large volume fraction. It was found that the brass foil with different hardness was mainly sensitive on the stress dependence of I c , but not on the strain sensitivity due to the residual strain induced in the laminated CC tapes during unloading.","PeriodicalId":20758,"journal":{"name":"Progress in Superconductivity and Cryogenics","volume":"18 1","pages":"21-24"},"PeriodicalIF":0.3,"publicationDate":"2016-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71376374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interruption analysis of the SFCL-combined DC circuit breaker system using current-limiting technology 采用限流技术的sfcl组合直流断路器系统中断分析

IF 0.3

Progress in Superconductivity and Cryogenics Pub Date : 2016-12-31 DOI: 10.9714/PSAC.2016.18.4.030

Jun-Beom Kim, In-Sung Jeong, Hyewon Choi, Hyosang Choi

引用次数: 2

Design of an Air-Core HTS quadruple triplet for a heavy ion accelerator 用于重离子加速器的Air-Core高温超导四重三重态设计

IF 0.3

Progress in Superconductivity and Cryogenics Pub Date : 2016-12-31 DOI: 10.9714/PSAC.2016.18.4.035

Zhan Zhang, Shaoqing Wei, Sangjin Lee

引用次数: 4

A compactly integrated cooling system of a combination dual 1.5-MW HTS motors for electric propulsion 用于电力推进的组合双1.5 mw高温超导电动机的紧凑集成冷却系统

IF 0.3

Progress in Superconductivity and Cryogenics Pub Date : 2016-12-31 DOI: 10.9714/PSAC.2016.18.4.025

T. D. Le, Jung Ho Kim, Chang Ju Hyeon, D. K. Kim, Y. Yoon, Jiho Lee, Y. G. Park, Haeryong Jeon, Huu Luong Quach, Ho Min Kim

引用次数: 5

Control the length of beam trajectory with a quadruple triplet for heavy ion accelerator 重离子加速器用四重三重态控制束流轨迹长度

IF 0.3

Progress in Superconductivity and Cryogenics Pub Date : 2016-12-31 DOI: 10.9714/PSAC.2016.18.4.040

Shaoqing Wei, Zhan Zhang, Sangjin Lee, Do Gyun Kim, Jangyoul Kim

引用次数: 1

Effect of BSO addition on Cu-O bond of GdBa 2 Cu 3 O 7-x films with varying thickness probed by extended x-ray absorption fine structure 扩展x射线吸收精细结构探测BSO添加对不同厚度gdba2cu3o7 -x薄膜Cu-O键的影响

IF 0.3

Progress in Superconductivity and Cryogenics Pub Date : 2016-12-31 DOI: 10.9714/PSAC.2016.18.4.001

H. Jeon, J. K. Lee, D. Yang, W. Kang, B. Kang

{"title":"Effect of BSO addition on Cu-O bond of GdBa 2 Cu 3 O 7-x films with varying thickness probed by extended x-ray absorption fine structure","authors":"H. Jeon, J. K. Lee, D. Yang, W. Kang, B. Kang","doi":"10.9714/PSAC.2016.18.4.001","DOIUrl":"https://doi.org/10.9714/PSAC.2016.18.4.001","url":null,"abstract":"We investigated the relation between the Cu-O bond length and the superconducting properties of BaSnO 3 (BSO)-added GdBa 2 Cu 3 O 7-x (GdBCO) thin films by using extended x-ray absorption fine structure (EXAFS) spectroscopy. 4 wt.% BaSnO 3 (BSO) added GdBa 2 Cu 3 O 7-x (GdBCO) thin films with varying thickness from 0.2 μm to 1.0 μm were fabricated by using pulsed laser deposition (PLD) method. The transition temperature (T c ) and the residual resistance ratio (RRR) of the GdBCO films increased with increasing thickness up to 0.8 μm, where the crystalline BSO has the highest peak intensity, and then decreased. This uncommon behaviors of T c and RRR are likely to be created by the addition of BSO, which may change the ordering of GdBCO atomic bonds. Analysis from the Cu K -edge EXAFS spectroscopy showed an interesting thickness dependence of ordering behavior of BSO-added GdBCO films. It is noticeable that the ordering of Cu-O bond and the transition temperature are found to show opposite behaviors in the thickness dependence. Based on these results, the growth of BSO seemingly have evident effect on the alteration of the local structure of GdBCO film.","PeriodicalId":20758,"journal":{"name":"Progress in Superconductivity and Cryogenics","volume":"18 1","pages":"1-4"},"PeriodicalIF":0.3,"publicationDate":"2016-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71376361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of electron beam irradiation on the superconducting properties of YBCO thin films 电子束辐照对YBCO薄膜超导性能的影响

IF 0.3

Progress in Superconductivity and Cryogenics Pub Date : 2016-12-31 DOI: 10.9714/PSAC.2016.18.4.015

Y. J. Lee, J. Choi, B. Jun, J. Joo, C. S. Kim, Chan-Joong Kim

引用次数: 3

Comparisons of internal self-field magnetic flux densities between recent Nb 3 Sn fusion magnet CICC cable designs 新型Nb - 3sn熔合磁体中金电缆内部自场磁通密度比较

IF 0.3

Progress in Superconductivity and Cryogenics Pub Date : 2016-09-30 DOI: 10.9714/PSAC.2016.18.3.010

S. Kwon

引用次数: 4