Superconductivity最新文献_第6页

Interface properties and failures of REBCO coated conductor tapes: Research progress and challenges REBCO涂层导体带的界面特性与失效:研究进展与挑战

Superconductivity Pub Date : 2023-11-07 DOI: 10.1016/j.supcon.2023.100068

Peifeng Gao , Yameng Zhang , Xingzhe Wang , Youhe Zhou

{"title":"Interface properties and failures of REBCO coated conductor tapes: Research progress and challenges","authors":"Peifeng Gao , Yameng Zhang , Xingzhe Wang , Youhe Zhou","doi":"10.1016/j.supcon.2023.100068","DOIUrl":"https://doi.org/10.1016/j.supcon.2023.100068","url":null,"abstract":"<div><p>RE-Ba-Cu-O (REBCO, where RE = Y, Gd, Sm, and other rare earth elements) coated conductor (CC) tapes are promising for applications in high-energy physics and high-field science owing to their significant advantages such as high critical magnetic field, high current density, and the ability to achieve superconductivity at liquid nitrogen temperatures. Nevertheless, the mechanical and superconducting performances of these CC tapes are significantly affected by interface failures, such as interfacial delamination and coating fractures, which arise from the complex interplay of mechanical stress induced by magnet processing, thermal mismatch stress during cooling, electromagnetic stress under high magnetic fields, and thermal stress during quenching. This study comprehensively reviews the interface properties and failure behavior of REBCO CC tapes. First, the research progress in characterizing the intricate interface properties of REBCO CC is systematically reviewed. Furthermore, the interface failure behavior in extreme multifield environments was analyzed and summarized. Subsequently, this study outlines optimization strategies to mitigate interface failure risks in REBCO superconducting magnet structures. Finally, we address the current challenges and future perspectives on interface issues in REBCO CC tapes. By addressing these challenges, this study offers valuable insights for advancing the development and practical implementation of superconducting technologies in diverse applications.</p></div>","PeriodicalId":101185,"journal":{"name":"Superconductivity","volume":"8 ","pages":"Article 100068"},"PeriodicalIF":0.0,"publicationDate":"2023-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772830723000339/pdfft?md5=839e6899444c4bcb4dcb1a4a8cf0d6f7&pid=1-s2.0-S2772830723000339-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134656498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Time-dependent development of dynamic resistance voltage of superconducting tape considering heat accumulation 考虑热积聚的超导带材动态电阻电压随时间的变化

Superconductivity Pub Date : 2023-09-20 DOI: 10.1016/j.supcon.2023.100066

Chao Li , Yuying Xing , Ying Xin , Bin Li , Francesco Grilli

引用次数: 1

Fatigue behaviors and damage mechanisms for Nb3Sn triple-helical structure at liquid nitrogen temperature Nb3Sn三螺旋结构在液氮温度下的疲劳行为和损伤机制

Superconductivity Pub Date : 2023-09-15 DOI: 10.1016/j.supcon.2023.100065

Lang Jiang, Zhiwei Zhang, Zhen Yu, Jun Zhou, Huadong Yong, Xingyi Zhang

{"title":"Fatigue behaviors and damage mechanisms for Nb3Sn triple-helical structure at liquid nitrogen temperature","authors":"Lang Jiang, Zhiwei Zhang, Zhen Yu, Jun Zhou, Huadong Yong, Xingyi Zhang","doi":"10.1016/j.supcon.2023.100065","DOIUrl":"https://doi.org/10.1016/j.supcon.2023.100065","url":null,"abstract":"<div><p>Nb<sub>3</sub>Sn triple-helical structure is the elementary structure in the superconducting cable of ITER magnets and undergoes prolonged fatigue loading in extreme environments leading to serious damage degradation. In this paper, the fatigue behaviors of the Nb<sub>3</sub>Sn triple-helical structure have been investigated by the strain cycling fatigue experiments at liquid nitrogen temperature. The results indicate that Nb<sub>3</sub>Sn triple-helical structures with short twist-pitches possess excellent fatigue damage resistance than that of long twist-pitches, such as longer fatigue life, slower damage degradation, and smaller energy dissipation. Meanwhile, a theoretical model of damage evolution has been established to reveal the effects of twist-pitches on fatigue properties for triple-helical structures, which is also validated by the present experimental data. Furthermore, one can see that the Nb<sub>3</sub>Sn superconducting wires in a triple-helical structure with the shorter twist-pitches have a larger elongation of helical structure and less cyclic deformation, which can be considered as the main mechanism of better fatigue damage properties for the triple-helical structures during the strain cycling processes. These findings provide a better understanding of the fatigue properties and damage mechanisms for Nb<sub>3</sub>Sn triple-helical structures in superconducting cables of ITER magnets.</p></div>","PeriodicalId":101185,"journal":{"name":"Superconductivity","volume":"8 ","pages":"Article 100065"},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49699001","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

A superconducting wireless energiser based on electromechanical energy conversion 一种基于机电能量转换的超导无线充能器

Superconductivity Pub Date : 2023-09-01 DOI: 10.1016/j.supcon.2023.100057

Hongye Zhang , Tianhui Yang , Francesco Grilli , Wenxin Li , Paul M. Tuohy , Ying Xin

{"title":"A superconducting wireless energiser based on electromechanical energy conversion","authors":"Hongye Zhang , Tianhui Yang , Francesco Grilli , Wenxin Li , Paul M. Tuohy , Ying Xin","doi":"10.1016/j.supcon.2023.100057","DOIUrl":"https://doi.org/10.1016/j.supcon.2023.100057","url":null,"abstract":"<div><p>A superconducting magnet (SM) can produce high magnetic fields up to a dozen times stronger than those generated by an electromagnet made of normal conductors or a permanent magnet (PM), and thus has attracted increasing research efforts in many domains including medical devices, large scientific equipment, transport, energy storage, power systems, and electric machines. Wireless energisers, e.g., high temperature superconducting (HTS) flux pumps, can eliminate the thermal load from current leads and arc erosion of slip rings, and are thus considered a promising energisation tool for SMs. However, the time-averaged DC output voltage in existing HTS flux pumps is generated by dynamic resistance: the dynamic loss is unavoidable, and the total AC loss will become significant at high frequencies. This study introduces a highly efficient superconducting wireless energizer (SWE) designed specifically for SMs. The SWE takes advantage of the inherent properties of a superconducting loop, including flux conservation and zero DC resistivity. Extensive theoretical analysis, numerical modelling exploiting the <strong>H</strong>-<em>ϕ</em> formulation, and experimental measurements were conducted to demonstrate the efficiency and efficacy of the novel SWE design. The electromechanical performance and loss characteristics of the SWE system have also been investigated. Compared to conventional HTS flux pumps, the proposed SWE has lower excitation loss, in the order of 10<sup>−1</sup> mW, and thus can achieve a high system efficiency of no less than 95%. Furthermore, it has a simpler structure with higher reliability, considered ready for further industrial development. In addition to deepening the understating of the intricate electromechanical dynamics between magnetic dipoles and superconducting circuits, this article provides a novel wireless energisation technique for SMs and opens the way to step changes in future electric transport and energy sectors.</p></div>","PeriodicalId":101185,"journal":{"name":"Superconductivity","volume":"7 ","pages":"Article 100057"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49698719","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

32 × 32 NbN SNSPD array based on thermally coupled row-column multiplexing architecture 基于热耦合行列复用结构的32×32NbN SNSPD阵列

Superconductivity Pub Date : 2023-09-01 DOI: 10.1016/j.supcon.2023.100056

TianZhu Zhang , You Xiao , HuiQin Yu , Jia Huang , ChaoLin Lv , LingDong Kong , XiaoYu Liu , Hao Li , LiXing You , Zhen Wang

引用次数: 0

Bending performance analysis on YBCO cable with high flexibility 高柔度YBCO电缆弯曲性能分析

Superconductivity Pub Date : 2023-09-01 DOI: 10.1016/j.supcon.2023.100054

Huan Jin , Qiong Wu , Guanyu Xiao , Chao Zhou , Haihong Liu , Yunfei Tan , Fang Liu , Jinggang Qin

{"title":"Bending performance analysis on YBCO cable with high flexibility","authors":"Huan Jin , Qiong Wu , Guanyu Xiao , Chao Zhou , Haihong Liu , Yunfei Tan , Fang Liu , Jinggang Qin","doi":"10.1016/j.supcon.2023.100054","DOIUrl":"https://doi.org/10.1016/j.supcon.2023.100054","url":null,"abstract":"<div><p>In order to utilize high-temperature superconducting Yttrium Barium Copper Oxide (YBCO) tapes to develop superconducting cables for high magnet field applications, it is critical to ensure the stable operation of the YBCO cable under challenging mechanical and thermal conditions. A new type of cable featuring the winding of YBCO and copper tapes around a spiral stainless steel tube has been proposed to increase flexibility and cooling. Experiments are performed to confirm that its critical current varies with the bending diameter. The cables wound with nine YBCO tapes in three layers show a critical current degradation of less than 5% for a bending diameter of 30 mm. The performance of the cable degrades as the number of wound layers increases. The critical current degradation of cable specimens wound from 15 tapes in five layers reached approximately 12% for a bending diameter of 30 mm. In addition, when compared to traditional CORC cable specimens, the developed cable specimens show better-bending flexibility and achieve a lower critical bending diameter. The finite element models show that the higher elasticity coefficient and lower plasticity of the stainless steel spiral tube results in a lower strain on the YBCO tapes of the HFRC cable than that of the CORC cable, and the maximum strain on the YBCO tapes of the HFRC cable was only about 10% of that of the CORC cable. Therefore, it is less likely that the YBCO tape in this type of cable will reach the irreversible strain limit during bending, resulting in a degradation in current carrying performance. Furthermore, the cooling efficiency can be improved by flowing the cooling medium inside the central core, which can significantly improve its thermal stability. These advantages indicate the possibility of using it in future high-field magnets with high current carrying capacity at fields greater than 15 T.</p></div>","PeriodicalId":101185,"journal":{"name":"Superconductivity","volume":"7 ","pages":"Article 100054"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49699005","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: 1

Magnetic bearings with double crossed loops modelled with T-A formulation and electric circuits 用T-A公式和电路建模的双交叉回路磁轴承

Superconductivity Pub Date : 2023-09-01 DOI: 10.1016/j.supcon.2023.100058

Bárbara Maria Oliveira Santos , Gabriel dos Santos , Flávio Goulart dos Reis Martins , Felipe Sass , Guilherme Gonçalves Sotelo , Rubens de Andrade Junior , Francesco Grilli

{"title":"Magnetic bearings with double crossed loops modelled with T-A formulation and electric circuits","authors":"Bárbara Maria Oliveira Santos , Gabriel dos Santos , Flávio Goulart dos Reis Martins , Felipe Sass , Guilherme Gonçalves Sotelo , Rubens de Andrade Junior , Francesco Grilli","doi":"10.1016/j.supcon.2023.100058","DOIUrl":"https://doi.org/10.1016/j.supcon.2023.100058","url":null,"abstract":"<div><p>The application of High-Temperature Superconductor (HTS) coils made of coated conductors has been investigated for many years. A possible configuration for such coils is the jointless loop, also known as the ring coil. The double crossed loop coil (DCLC) has been successfully applied in superconducting magnetic bearings (SMBs). The design of SMBs with DCLCs requires flexible modelling to allow all parts of the device to be represented. This work proposes the T-A formulation with a thin-film approximation for modelling SMB with DCLCs in the finite element analysis framework. A 2D representation of the system is coupled with an external electric circuit to model the continuity of the lines that represent the parts of each jointless loop. To couple the T-A formulation and the circuit, an average of the total electric field, with both resistive and inductive components, is applied to the circuit. The total current computed by the circuit is applied to the T-A formulation. The proposed methodology was validated by comparison with levitation force experimental data. Two types of tests were simulated: five levitation force tests and three guidance force tests. It is shown that there is a limit to the behaviour of the levitation force related to the high-loss state. Below this limit, the stack of DCLCs behaves as an equivalent bulk. Beyond this limit, a high-loss state appears as a linear growth of the levitation force. It is also shown that this high-loss state in vertical displacement influences the lateral force.</p></div>","PeriodicalId":101185,"journal":{"name":"Superconductivity","volume":"7 ","pages":"Article 100058"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49698731","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

Characterizations of the electrothermal parameters of a transition edge sensor microcalorimeter and its energy resolution 过渡边缘传感器微热量计电热参数的表征及其能量分辨率

Superconductivity Pub Date : 2023-09-01 DOI: 10.1016/j.supcon.2023.100051

Yue Zhao, Hubing Wang, Bo Gao, Zhen Wang

引用次数: 1

Estimation of critical current density of bulk superconductor with artificial neural network 用人工神经网络估算大块超导体的临界电流密度

Superconductivity Pub Date : 2023-09-01 DOI: 10.1016/j.supcon.2023.100055

Gangling Wu, Huadong Yong

{"title":"Estimation of critical current density of bulk superconductor with artificial neural network","authors":"Gangling Wu, Huadong Yong","doi":"10.1016/j.supcon.2023.100055","DOIUrl":"https://doi.org/10.1016/j.supcon.2023.100055","url":null,"abstract":"<div><p>In the applications of superconducting materials, the critical current density <span><math><mrow><msub><mi>J</mi><mi>c</mi></msub><mrow><mfenced><mrow><mi>B</mi></mrow></mfenced></mrow></mrow></math></span> is a crucial performance parameter. The conventional method of measuring <span><math><mrow><msub><mi>J</mi><mi>c</mi></msub><mrow><mfenced><mrow><mi>B</mi></mrow></mfenced></mrow></mrow></math></span> of bulk superconductor is magnetization method. However, there are errors in the estimation of <span><math><mrow><msub><mi>J</mi><mi>c</mi></msub><mrow><mfenced><mrow><mi>B</mi></mrow></mfenced></mrow></mrow></math></span> in the lower field, and the estimation is not applicable in the region where the magnetic field reverses. In this paper, <span><math><mrow><msub><mi>J</mi><mi>c</mi></msub><mrow><mfenced><mrow><mi>B</mi></mrow></mfenced></mrow></mrow></math></span> of the bulk superconductor is determined by the hysteresis and magnetostriction loops with artificial neural network (ANN), respectively. Compared with double-output ANN, the critical current density obtained by single-output ANN is more accurate. Finally, the prediction results given by the hysteresis and magnetostriction loops are discussed.</p></div>","PeriodicalId":101185,"journal":{"name":"Superconductivity","volume":"7 ","pages":"Article 100055"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49699009","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

The event and skepticism for the electrical conductor LK-99 at ambient temperature and pressure 环境温度和压力下电导体LK-99的事件和怀疑

Superconductivity Pub Date : 2023-09-01 DOI: 10.1016/j.supcon.2023.100059

Zili Zhang

引用次数: 0