{"title":"TechRxiv: Share Your Preprint Research with the World!","authors":"","doi":"10.1109/TASC.2025.3571582","DOIUrl":"https://doi.org/10.1109/TASC.2025.3571582","url":null,"abstract":"","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 4","pages":"1-1"},"PeriodicalIF":1.7,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11021253","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144219643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"IEEE Transactions on Applied Superconductivity Information for Authors","authors":"","doi":"10.1109/TASC.2025.3566573","DOIUrl":"https://doi.org/10.1109/TASC.2025.3566573","url":null,"abstract":"","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 4","pages":"C4-C4"},"PeriodicalIF":1.7,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11021269","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144196721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"IEEE Foundation: We Gave Today to Inspire a Brighter Tomorrow","authors":"","doi":"10.1109/TASC.2025.3571584","DOIUrl":"https://doi.org/10.1109/TASC.2025.3571584","url":null,"abstract":"","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 4","pages":"1-1"},"PeriodicalIF":1.7,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11021254","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144219800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A New Test Approach to Taking Negative Bias Currents as Optimization Parameters for RSFQ Circuits","authors":"Minghui Zhang;Minghui Niu;Xiaoping Gao;Huanli Liu;Jiahong Yang;Xiangyu Zheng;Wenqing Hui;Guangming Tang;Jie Ren","doi":"10.1109/TASC.2025.3565743","DOIUrl":"https://doi.org/10.1109/TASC.2025.3565743","url":null,"abstract":"The magnetic fields induced by the bias currents and the return currents flowing on a ground plane have a great influence on the performance of complex rapid single flux quantum (RSFQ) circuits. Conventional approach applies equal negative bias currents to the ground contacts adjacent to the bias supply contacts to alleviate this problem, but this strategy may not be optimal when the power supply network is complex. We propose a new test approach to adjusting the negative bias currents independently. By changing the current distribution and thereby altering the spatial distribution of the magnetic field across the chip, this approach can make the circuit work, or make the circuit work more stably. Experimental validation on two 8-bit RSFQ CPUs demonstrated the approach's efficacy: redistributing negative currents restored functionality in a nonoperational circuit and eliminated the intermittent failure in another. These results highlight the critical role of adjusting current distribution in overcoming magnetic interference, offering a practical solution for testing and optimizing the power supply of complex RSFQ circuits where conventional approach falls short.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 4","pages":"1-6"},"PeriodicalIF":1.7,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144090696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pavel N. Degtyarenko;Alexey V. Ovcharov;Alexey Yu. Tsvetkov;Igor A. Karateev;Alexander L. Vasiliev;Vadim A. Amelichev;Burkhan I. Massalimov;Ekaterina A. Golovkova
{"title":"The Influence of Gadolinium Content in GdBCO Industrial 2G HTS Wires on the Superconducting Properties in Magnetic Field","authors":"Pavel N. Degtyarenko;Alexey V. Ovcharov;Alexey Yu. Tsvetkov;Igor A. Karateev;Alexander L. Vasiliev;Vadim A. Amelichev;Burkhan I. Massalimov;Ekaterina A. Golovkova","doi":"10.1109/TASC.2025.3564716","DOIUrl":"https://doi.org/10.1109/TASC.2025.3564716","url":null,"abstract":"The study of the 12-mm-wide 2G HTS wires with gadolinium excess is presented. The GdBCO layer was grown by pulsed laser deposition using commercial production equipment and contained different concentration of Gd: pristine sample, +15%, +30%, and +45% of Gd contents. The samples were characterized by transport measurements over wide temperature (<italic>T</i>) and magnetic field (<italic>B</i>) ranges. The microstructure investigations were carried out by scanning transmission electron microscopy. The resistivity curves of the samples were measured in the field up to 9 T. We determined that the irreversibility temperature (<italic>T</i><sub>irr</sub>) derived from these curves is maximum in case of <italic>B</i>‖<italic>ab</i>. Irreversibility temperature has been decreased with increasing of applied magnetic field from 0 to 3 Т and that confirmed by measurements of the resistivity transition as imaginary part of magnetic susceptibility (<italic>χ</i>”). The maximum of <italic>T</i><sub>irr</sub> obtained in the experiments indicate a different pinning structure mechanism in the studied samples.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 4","pages":"1-8"},"PeriodicalIF":1.7,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144090735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dmytro Abraimov;Diego Arbelaez;Lucas Brouwer;Helen Feng;Paolo Ferracin;William B. Ghiorso;Hugh C. Higley;Mariusz Juchno;Andy Lin;Thomas Lipton;Linqing Luo;Maxim Marchevsky;Ian Pong;Soren O. Prestemon;Kyle Radcliff;José Luis Rudeiros Fernández;Anjana Saravanan;Tengming Shen;Reed Teyber;Marcos Turqueti;Danko van der Laan;Xiaorong Wang;Jeremy D. Weiss;Yuxin Wu
{"title":"Fabrication and Test of C3a: A Six-Layer Subscale Canted $cos theta$ Dipole Magnet Using High-Temperature Superconducting corc Wires","authors":"Dmytro Abraimov;Diego Arbelaez;Lucas Brouwer;Helen Feng;Paolo Ferracin;William B. Ghiorso;Hugh C. Higley;Mariusz Juchno;Andy Lin;Thomas Lipton;Linqing Luo;Maxim Marchevsky;Ian Pong;Soren O. Prestemon;Kyle Radcliff;José Luis Rudeiros Fernández;Anjana Saravanan;Tengming Shen;Reed Teyber;Marcos Turqueti;Danko van der Laan;Xiaorong Wang;Jeremy D. Weiss;Yuxin Wu","doi":"10.1109/TASC.2025.3565222","DOIUrl":"https://doi.org/10.1109/TASC.2025.3565222","url":null,"abstract":"<sc>rebco</small> coated conductors have a strong potential for high-field magnet applications. The <sc>rebco</small> technology, however, is still in its infancy for accelerator magnet applications. As part of the U.S. Magnet Development Program, we developed a six-layer canted <inline-formula><tex-math>$cos theta$</tex-math></inline-formula> dipole magnet, C3a, using <sc>corc</small> wires developed by Advanced Conductor Technologies LLC. All the layers were wound using a semiautomated winding machine. Three layers of the magnet used <sc>corc</small> wires containing the SuperPower “AP” <sc>rebco</small> tapes and the remaining layers used the wires containing the “HM” tapes. At 77 K, both kinds of <sc>corc</small> wires showed 5% to 10% degradation, after bending to a minimum bend radius of 30 or 35 mm, with respect to the self-field critical current measured before winding. At 4.2 K, the magnet reached 9.5 kA at a ramp rate of 9 A s<inline-formula><tex-math>$^{-1}$</tex-math></inline-formula> and generated a dipole field of 1.4 T. The critical current of one layer degraded by 4% after a current transient up to 10.5 kA ramped in an averaged rate of 175 kA s<inline-formula><tex-math>$^{-1}$</tex-math></inline-formula> or 20 T s<inline-formula><tex-math>$^{-1}$</tex-math></inline-formula>. We confirmed the HM <sc>corc</small> wire can carry a higher current than the AP <sc>corc</small> wire at 4.2 K. The test results of the C3a magnet showed that the fabrication and assembly procedure can be used for the upcoming full-scale C3 magnet.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 6","pages":"1-15"},"PeriodicalIF":1.7,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144117291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}